"Chetro Ketl great kiva" by U.S. National Park Service , public domain
Chaco Culture
National Historical Park - New Mexico
Chaco Culture National Historical Park is a United States National Historical Park hosting the densest and most exceptional concentration of pueblos in the American Southwest.
Brochure of World Heritage Sites in the United States. Published by the National Park Service (NPS).
https://www.nps.gov/chcu/index.htm
https://en.wikipedia.org/wiki/Chaco_Culture_National_Historical_Park
Chaco Culture National Historical Park is a United States National Historical Park hosting the densest and most exceptional concentration of pueblos in the American Southwest.
Explore the monumental structures and breathtaking landscape at Chaco, a thriving regional center for the ancestral Pueblo people from 850 to 1250 CE (Common Era), through guided tours, hiking & biking trails, evening campfire talks, night sky programs, and more. Chaco Canyon is a sacred and deeply personal place for many Indigenous peoples throughout the Southwest. Please visit with respect.
Your journey into Chaco Canyon will take you through private tribal lands. Please be respectful of our tribal neighbors and their livestock and leave no trace of your journey on their lands. Chaco Canyon is located in northwestern New Mexico. The park can only be accessed by driving on dirt roads. Road conditions can be rough or impassable. Please call in advance for updates.
Chaco Culture National Historical Park Visitor Center
This is Chaco Culture's only visitor center. The hours of operation are 9:00am-5:00pm every day. Please stop in before heading into the park. The visitor center is closed on Thanksgiving, Christmas, and New Year's Day.
Please click on the link for detailed directions to our visitor center.
Gallo Campground
Gallo Campground, located one mile (1.6 km) east of the visitor center, is open year-round. The campground has 24 individual sites and 2 group sites. We recommend making a reservation on www.recreation.gov to ensure a camping or RV space on the dates you plan to visit. Hook-ups are not available. The campground is closed 6 nights throughout the year: the day before Thanksgiving, Thanksgiving night, Christmas eve, Christmas night, New Year's Eve, and New Year's night.
Camping Fees
20.00
Individual sites are $20/night. Senior and Access passes offer a discount for camping. Group sites are a flat rate of $60/night. Visit www.recreation.gov or call 1-877-444-6777.
Gallo Campground
A tent on a pad in the Gallo Campground surrounded by green shrubbery and canyon walls.
There are 24 available sites in the Gallo Campground and 2 group sites.
Fajada Butte
Fajada Butte's silhoutte shown under a timelapse image of stars appearing in a vibrant circle above.
Chaco Culture National Historical Park is an International Dark Sky Park.
Chaco Culture NHP Entrance Sign
The entrance sign to Chaco Culture made out of sandstone and showing Fajada Butte through a window.
Welcome to Chaco Culture National Historical Park!
Sandstone Walls
Colorful sandstone walls with two open sections in the middle that look like doorways.
Most walls seen at Chaco Culture NHP are close to 1,000 years old.
Raven
A raven perched on the side of a canyon wall.
Observe many ravens while visiting Chaco Culture NHP.
Pueblo Bonito
An aerial view of the Pueblo Bonito great house showing many rooms and circular kivas.
Pueblo Bonito is the largest great house within Chaco Canyon.
Chacoan Jars
A series of 4 Chacoan jars replicated in the same black on white style that was excavated long ago.
Chaco Culture National Historical Park is home to impressive pottery built by the ancestral Pueblo people.
What Do Pack Rats Reveal About Ancient Chaco Architecture?
Pack rats' middens are climate time capsules. Learn what scientists learned from the middens about the Chaco people and their surroundings as they adapted to climate change.
Wall of Pueblo Bonito including logs
A New Perspective
On my drive out west toward Grand Canyon this year, I had the chance to stop at a few Ancestral Puebloan sites – namely, Bandelier, Chaco Culture, and Aztec Ruins. Having worked and spent some time around these types of sites before, I felt like I was seeing and appreciating these special places on a much deeper level than even I realized was possible.
partial stone ruin walls form what was an interior corner of a room with doorway in corner.
NPS Geodiversity Atlas—Chaco Culture National Historical Park, New Mexico
Each park-specific page in the NPS Geodiversity Atlas provides basic information on the significant geologic features and processes occurring in the park. Links to products from Baseline Geologic and Soil Resources Inventories provide access to maps and reports.
stone building ruins
2019 Connecting with our Homelands Awardees
Hopa Mountain, in partnership with the National Park Service, is pleased to announce the 2019 awardees of the Connecting with our Homelands travel grants. Twenty-one Indigenous organizations, schools, and nonprofits have been awarded travel funds for trips to national park units across 12 states/territories within the United States.
An elder and young student talk while sitting on a rock.
Increasing temperature seasonality may overwhelm shifts in soil moisture to favor shrub over grass dominance in Colorado Plateau drylands
Increasing variability of temperature favors a shift to shrublands over grasslands in arid southwestern landscapes. This effect is greater than the effect of increasing soil moisture, which favors a shift to grasslands over shrublands.
Grassland with scattered junipers and hills in the background.
2011 SCPN-NAU Student Projects
In spring 2011, the SCPN-NAU School of Communication collaboration began with a multimedia studies course focused on documenting park resources and resource projects. The class was taught by NAU professors Laura Camden and Peter Friederici.
2011 Student Projects
The Colorado Plateau
The Colorado Plateau is centered on the four corners area of the Southwest, and includes much of Arizona, Utah, Colorado, and New Mexico.
Hazy Fajada Butte, Chaco Culture National Monument
Monitoring Upland Vegetation and Soils on the Southern Colorado Plateau
Vegetation and soils are the foundation upon which all terrestrial ecosystems are built. Soils provide the medium for the storage and delivery of water and nutrients to plants, which in turn provide animal populations with both habitat and food.
Sampling grassland vegetation at a long-term monitoring plot at Wupatki National Monument
Modeling Past and Future Soil Moisture in Southern Colorado Plateau National Parks and Monuments
In this project, USGS and NPS scientists used the range of variation in historical climate data to provide context for assessing the relative impact of projected future climate on soil water availability. This report provides the results of modeled SWP generated for 11 ecosystems in nine Southern Colorado Plateau Network parks.
Extensive grassland at Wupatki National Monument
Monitoring Night Skies and Natural Soundscapes on the Southern Colorado Plateau
Many national parks in the Southern Colorado Plateau region contain large areas of wilderness, where dark night skies and natural soundscapes are important human values. Dark night skies, which depend upon the visibility of stars and other natural components, are diminishing resources in several park units because of anthropogenic activities. Natural soundscapes—that is, the natural sounds of wildlands—are degraded by sounds caused by humans or human technology.
Clouds and sky turning red and orange over Navajo National Monument at sunset
Fossils in Focus: Using Photogrammetry and 3D Models to Highlight Recent Paleontological Discoveries at Chaco Culture National Historical Park
During the past decade paleontologists have uncovered a rich fossil record at Chaco Culture National Historical Park, New Mexico. In order to share the important and interesting fossils discovered at the park, a new website was developed to feature 3-D images of a few fossils documented at the park.
person outdoors recording data on a hand held instrument
Petrified Tree stump
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
petrified wood tree stump
Making Prehistoric Music: Musical Instruments from Ancestral Puebloan Sites
The world of the Ancestral Puebloans, or Anasazi, has been a major research area for archeologists of the Southwest, who have examined the nature and evolution of these prehistoric people from many angles. Emily Brown, a former NPS archeologist, is taking a fresh approach to the Ancestral Puebloans: she is studying the instruments that were used to make music.
Gourd with designs etched into its surface.
Late Cretaceous Ammonite
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
fossil on sandstone
Plesiosaur Bone Fossil
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
fossil on sandstone
Ripples and Bivalves
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
sandstone boulder
Inoceramus shells
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
fossil shells on sandstone
Mosasaur Jaw
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
fossil in sandstone
Vegetation Characterization and Mapping on the Southern Colorado Plateau
Vegetation mapping is a tool used by botanists, ecologists, and land managers to better understand the abundance, diversity, and distribution of different vegetation types across a landscape.
Vegetation plots used for the classification and mapping of El Malpais NM
Climate Change on the Southern Colorado Plateau
The combination of high. elevation and a semi-arid climate makes the Colorado Plateau particularly vulnerable to climate change. Climate models predict that over the next 100 years, the Southwest will become warmer and even more arid, with more extreme droughts than the region has experienced in the recent past.
One result of climate change may be more, larger floods, like this flash flood in Glen Canyon NRA
Monitoring Spring Ecosystems on the Southern Colorado Plateau
Springs are important water sources in arid landscapes, supporting unique plant associations and sustaining high levels of biotic diversity. Because springs rely on groundwater, they can serve as important indicators of change in local and regional aquifers. On the Colorado Plateau, spring ecosystems also provide vital habitat for both endemic and regionally rare species, including several types of orchids and declining populations of leopard frogs.
A pool of water filled with vegetation and sheltered by large rocks
Southern Colorado Plateau Mammal Inventories
Mammal inventories help to close the gap in our knowledge and understanding of some taxonomic groups on the Colorado Plateau.
Coyote (Canis latrans)
Shark and Vertebrate Fossils
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
small stones and fossils on the ground
Ancient Ripple Marks
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
sandstone surface with ripple marks
Series: Geologic Time Periods in the Mesozoic Era
The Mesozoic Era (251.9 to 66 million years ago) was the "Age of Reptiles." During the Mesozoic, Pangaea began separating into the modern continents, and the modern Rocky Mountains rose. Dinosaurs, crocodiles, and pterosaurs ruled the land and air. As climate changed and rapid plate tectonics resulted in shallow ocean basins, sea levels rose world-wide and seas expanded across the center of North America.
fossil dinosaur skull in rock face
Series: Park Paleontology News - Vol. 12, No. 1, Spring 2020
All across the park system, scientists, rangers, and interpreters are engaged in the important work of studying, protecting, and sharing our rich fossil heritage. <a href="https://www.nps.gov/subjects/fossils/newsletters.htm">Park Paleontology news</a> provides a close up look at the important work of caring for these irreplaceable resources. <ul><li>Contribute to Park Paleontology News by contacting the <a href="https://www.nps.gov/common/utilities/sendmail/sendemail.cfm?o=5D8CD5B898DDBB8387BA1DBBFD02A8AE4FBD489F4FF88B9049&r=/subjects/geoscientistsinparks/photo-galleries.htm">newsletter editor</a></li><li>Learn more about <a href="https://www.nps.gov/subjects/fossils/">Fossils & Paleontology</a> </li><li>Celebrate <a href="https://www.nps.gov/subjects/fossilday/">National Fossil Day</a> with events across the nation</li></ul>
two people standing outdoors near a fossil tree base
Series: Chaco Collections—Paleontology
The fossils at Chaco represent ten to fifteen million years of life on Earth, during the Late Cretaceous when New Mexico sat on the ever-changing coastline of an inland sea. This ocean, known as the Western Interior Seaway, was home to sharks and giant reptilian predators like mosasaurs and plesiosaurs, as well as ammonites, relatives of today’s squids. NPS scientists used imaging techniques to create virtual 3D models of a few of the park’s paleontological treasures.
artist rendering of giant mosasaur swimming and feeding on ammonites
Series: Defining the Southwest
The Southwest has a special place in the American imagination – one filled with canyon lands, cacti, roadrunners, perpetual desert heat, a glaring sun, and the unfolding of history in places like Tombstone and Santa Fe. In the American mind, the Southwest is a place without boundaries – a land with its own style and its own pace – a land that ultimately defies a single definition.
Maize agriculture is one component of a general cultural definition of the Southwest.
Series: SCPN-NAU School of Communication Collaboration
The Southern Colorado Plateau Network (SCPN) of the National Park Service has been partnering with the Northern Arizona University (NAU) School of Communication since 2011 to develop student multimedia projects that highlight resources and activities in network parks. This collaboration gives NAU students hands-on experience in creating multimedia projects and provides network parks with products that can help to promote their unique resources and scientific or educational project work.
SCPN-NAU student projects
Cretaceous Period—145.0 to 66.0 MYA
Many now-arid western parks, including Chaco Culture National Historical Park and Mesa Verde National Park, were inundated by the Cretaceous Interior Seaway that bisected North America. Massive dinosaur and other reptile fossils are found in Cretaceous rocks of Big Bend National Park.
dinosaur footprint in stone
Mesozoic Era
The Mesozoic Era (251.9 to 66 million years ago) was the "Age of Reptiles." During the Mesozoic, Pangaea began separating into the modern continents, and the modern Rocky Mountains rose. Dinosaurs, crocodiles, and pterosaurs ruled the land and air. As climate changed and rapid plate tectonics resulted in shallow ocean basins, sea levels rose world-wide and seas expanded across the center of North America.
fossil dinosaur skull in rock face
The Intersecting Crossroads of Paleontology and Archeology: When are Fossils Considered Artifacts?
Understanding human knowledge and attitudes (human dimensions) towards paleontological resources through the cooccurrence of fossils and artifacts and/or tribal consultation (archeological context) helps us better appreciate those human values, perspectives, and beliefs. This understanding is important to the management, protection, and interpretation of these non-renewable resources.
colorful arrowhead on black background
Series: Intermountain Park Science 2021
Integrating Research and Resource Management in Intermountain National Parks
Group of National Park Service staff and volunteers standing in front of a desert canyon.
Chaco Canyon and the Antiquities Act
Between AD 850 and 1250, Chaco Canyon was a hub of cultural activity for Native American peoples, a landscape of multi-storied masonry buildings, roads, water control and distribution systems, and petroglyphs, pictographs, and calendrical markings. Concern over the looting of artifacts and loss of irreplaceable information led to the designation of Chaco Canyon National Monument on March 11, 1907.
View overlooking ruins at Chaco Canyon.
Find Your Park on Route 66
Route 66 and the National Park Service have always had an important historical connection. Route 66 was known as the great road west and after World War II families on vacation took to the road in great numbers to visit the many National Park Service sites in the Southwest and beyond. That connection remains very alive and present today. Take a trip down Route 66 and Find Your Park today!
A paved road with fields in the distance. On the road is a white Oklahoma Route 66 emblem.
Changing Patterns of Water Availability May Change Vegetation Composition in US National Parks
Across the US, changes in water availability are altering which plants grow where. These changes are evident at a broad scale. But not all areas experience the same climate in the same way, even within the boundaries of a single national park. A new dataset gives park managers a valuable tool for understanding why vegetation has changed and how it might change in the future under different climate-change scenarios.
Green, orange, and dead grey junipers in red soil, mountains in background
Water Resources on the Colorado Plateau
Describes the origin, uses, threats to, and conservation of water on the Colorado Plateau.
Dark green body of water winding through red rock formations with brilliant sun overhead.
National Parks in the History of Science: Dendrochronology (Video)
Scientists around the world use tree rings to understand past climates, ecosystems, and cultures. The study of tree rings to understand the past is called dendrochronology. This field of science began in several national parks in the Southwest: Mesa Verde, Aztec Ruins, Chaco Culture, and others.
a black and white photo of tree rings close up
Series: Parks in Science History
Parks in Science History is a series of articles and videos made in cooperation with graduate students from various universities. They highlight the roles that national parks have played in the history of science and, therefore, the world's intellectual heritage.
A woman looking through binoculars
Studying the Past and Predicting the Future Using Rat Nests
In the western United States, packrat middens are one of the best tools for reconstructing recent environments and climates. These accumulations of plant fragments, small vertebrate remains, rodent droppings, and other fossils can be preserved for more than 50,000 years. Packrat middens have been found in at least 41 National Park Service units.
Photo of a wood rat.
Series: Park Paleontology News - Vol. 14, No. 2, Fall 2022
All across the park system, scientists, rangers, and interpreters are engaged in the important work of studying, protecting, and sharing our rich fossil heritage. <a href="https://www.nps.gov/subjects/fossils/newsletters.htm">Park Paleontology news</a> provides a close up look at the important work of caring for these irreplaceable resources. <ul><li>Contribute to Park Paleontology News by contacting the <a href="https://www.nps.gov/common/utilities/sendmail/sendemail.cfm?o=5D8CD5B898DDBB8387BA1DBBFD02A8AE4FBD489F4FF88B9049&r=/subjects/geoscientistsinparks/photo-galleries.htm">newsletter editor</a></li><li>Learn more about <a href="https://www.nps.gov/subjects/fossils/">Fossils & Paleontology</a> </li><li>Celebrate <a href="https://www.nps.gov/subjects/fossilday/">National Fossil Day</a> with events across the nation</li></ul>
Photo of a person sitting while using a laboratory microscope.
Series: Geologic Time—Major Divisions and NPS Fossils
The National Park System contains a magnificent record of geologic time because rocks from each period of the geologic time scale are preserved in park landscapes. The geologic time scale is divided into four large periods of time—the Cenozoic Era, Mesozoic Era, Paleozoic Era, and The Precambrian.
photo of desert landscape with a petrified wood log on the surface
Making an Impact: Long-Term Monitoring of Natural Resources at Intermountain Region National Parks, 2021
Across the Intermountain Region, Inventory & Monitoring Division ecologists are helping to track the effects of climate change, provide baseline information for resource management, evaluate new technologies, and inspire the next generation of park stewards. This article highlights accomplishments achieved during fiscal year 2021.
A man looks through binoculars at sunrise.
Testing Treatments for Mitigating Climate-Change Effects on Adobe Structures in the National Parks
In the US Southwest, climate change is making it harder to preserve historic adobe structures for future generations. Using adobe test walls and rainshower simulators, staff at the Desert Research Learning Center are evaluating the potential for increased erosion, and testing the effectiveness of different treatments methods to protect against it. The results will help park managers tailor their preservation methods to better protect culturally valuable resources.
American flag viewed through the remains of an adobe doorway.
The Plateau Postcard: Spring-Summer 2023
The Plateau Postcard is the official newsletter of the Southern Colorado Plateau Inventory and Monitoring Network. In this issue, we say hello to many new faces within the network and head to the field with some of this year's spectacular monitoring crews.
Pile of postcards with images of various southwest national parks on them.
A Changing Bimodal Climate Zone Means Changing Vegetation in Western National Parks
When the climate changes enough, the vegetation communities growing in any given place will also change. Under an expanded bimodal climate zone, some plant communities in western national parks are more likely to change than others. National Park Service ecologists and partners investigated the future conditions that may force some of this change. Having this information can help park managers decide whether to resist, direct, or accept the change.
Dark storm clouds and rainbow over mountains and saguaros.
Project Profile: Expand Southwest Seed Partnership for Intermountain Region Parks
The National Park Service and organizations of the Southwest Seed Partnership will implement the National Seed Strategy and associated revegetation and ecosystem restoration efforts. The project focuses on native plant development and involves collecting, producing, cleaning, testing, tracking, and storing seeds from native species.
grasses and shrubs on a hillside
National Park Service project to build up 'workhorse' native seed stocks for major restoration and revegetation efforts
The National Park Service, with funds from the Bipartisan Infrastructure Law, will be able to build up stocks of the native workhorse plant species that can out compete invasive plant species so that native grasses and forbs can grow in previously disturbed areas.
a man kneels next to a bucket collecting seeds in a field
Archeoastronomy in Stone
People in the past carved petroglyphs and painted pictographs to mark the cycle of the sun, moon, and stars; solstices; and the changing seasons. They tracked time by creating solar calendars that interacted with light and shadow as the sun moved across the sky. When unique astronomical events took place, they documented the moment in stone. Learn more about the purpose for these images.
Four images of light touching rock. NPS photo.
Data Publication Brief - Aquatic Macroinvertebrates and Upland Vegetation/Soils
The data packages for all our long-term monitoring efforts across the Southern Colorado Plateau are the foundations for almost everything we do here. We recently underwent our biggest effort yet in reformatting our data to fit the new standards put out by the Inventory & Monitoring Division. We are proud to announce that two of our largest datasets have now been published and are available for everyone to utilize.
A split image, one side is a stonefly insect and the other side is a white flower.
Change Over Time in Semi-Arid Grassland and Shrublands at Three Parks: Chaco Culture National Historical Park, Petrified Forest National Park, and Wupatki National Monument - 2007-2021
This report presents results of upland vegetation and soil monitoring of semi-arid grasslands at three parks by SCPN from 2007–2021. The purpose is to compare and contrast five grassland ecological sites and examine how they have changed during the first 15 years of monitoring.
Yellow and white flowers growing out of landscape covered with fragments of petrified wood.
50 Nifty Finds #42: Model Rangers
The beige women’s wardrobe is one of the most misunderstood National Park Service (NPS) uniforms. It’s also the uniform that usually gets the most attention—despite being worn for only three years. Many incorrectly believe it dates to the 1960s and featured miniskirts and go-go boots. The fact that it is the one least like the standard green ranger uniform wasn’t an accident.
Three beige and one orange dresses
The Plateau Postcard: Winter 2024
The Plateau Postcard is the official newsletter of the Southern Colorado Plateau Inventory and Monitoring Network. In this issue, we learn about how we are trying to predict pinyon-juniper die-offs, as well as a new tool we developed to help make us all better field scientists, and we hear from Bob Parmenter about his remarkable career at Valles Caldera National Preserve.
A pile of postcards.
Updated Species Database Will Help Boost Amphibian Conservation Across the National Park Service
To steward amphibians effectively, managers need basic information about which species live in parks. But species lists need constant maintenance to remain accurate. Due to recent efforts, the National Park Service now has an up-to-date amphibian species checklist for almost 300 parks. This information can serve as the basis for innumerable conservation efforts across the nation.
A toad sits on red sand, looking into the camera.
Dinosaurs of the National Park Service
Dinosaur fossils have been discovered at or are associated with at least 27 NPS units. Geographically, their finds are concentrated in the parks of the Colorado Plateau, but they have been found from central Alaska to Big Bend National Park in Texas to Springfield Armory National Historic Site in Massachusetts. The most famous site is the Dinosaur Quarry of Dinosaur National Monument, but a rush of new finds since the 1970s has greatly expanded our knowledge.
allosaurus fossil
The Challenge of Disastrous Events Isn’t Only Operational
National Park Service employees prepare to protect people, assets, and infrastructure from disasters. But what about when it comes to their own well-being?
Wildland firefighters in the haze by a road.
Series: Park Paleontology News - Vol. 10, No. 2, Fall 2018
All across the park system, scientists, rangers, and interpreters are engaged in the important work of studying, protecting, and sharing our rich fossil heritage. <a href="https://www.nps.gov/subjects/fossils/newsletters.htm">Park Paleontology news</a> provides a close up look at the important work of caring for these irreplaceable resources. <ul><li>Contribute to Park Paleontology News by contacting the <a href="https://www.nps.gov/common/utilities/sendmail/sendemail.cfm?o=5D8CD5B898DDBB8387BA1DBBFD02A8AE4FBD489F4FF88B9049&r=/subjects/geoscientistsinparks/photo-galleries.htm">newsletter editor</a></li><li>Learn more about <a href="https://www.nps.gov/subjects/fossils/">Fossils & Paleontology</a> </li><li>Celebrate <a href="https://www.nps.gov/subjects/fossilday/">National Fossil Day</a> with events across the nation</li></ul>
NPS staff work to document a recently discovered slab of Navajo Sandstone
Chaco Culture
National Hisitorical Park
National Park Service
U.S. Department of the Interior
A Brief History of Chaco Culture National Historical Park
AD 850 to 1250
Chaco Canyon served as a major urban center
of ancestral Puebloan culture. Remarkable for
its monumental public and ceremonial buildings, engineering projects, astronomy, artistic
achievements, and distinctive architecture, it
served as a hub of ceremony, trade, and administration for the prehistoric Four Corners area
for 400 years—unlike anything before or since.
1250 to present
Members of affiliated clans and religious societies from Hopi and the Pueblos of New Mexico
continue to return to Chaco on pilgrimages to
honor their ancestral homelands.
1500s
By the 1500s (possibly decades earlier), what
archeologists recognize as Navajo settlement
patterns were already well established in the
Dinétah area, northeast of Chaco in Blanco,
Largo, and Gobernador canyons.
1680
The Pueblo Revolt of 1680 briefly unified the
Pueblo peoples of New Mexico and their allied
neighbors, and expelled Spanish settlers from
the Southwest.
1692
Spanish re-conquest forced Pueblo patriots into
exile. Many took refuge with Navajo people living in the Dinétah region, and the resulting cultural interactions included intermarriage; the
exchange of ceremonial knowledge; and conflict
and competition.
1700s
By the 1700s, what archeologists recognize as
Navajo settlement patterns were well established in Chaco Canyon.
1778
A map produced by Don Bernardo de Miera y
Pacheco identified the Chaco Canyon area as
“Chaca,” a Spanish colonial word commonly
used during that era meaning “a large expanse
of open and unexplored land, desert, plain, or
prairie.” “Chaca” is believed to be the origin of
both “Chacra” and “Chaco.” The Acoma place
name for Chaco, W’aasfba shak’a, meaning
“place of greasewood,” may have been shortened to “Chaca.” Another possibility is that
“Chaca” may be a Spanish translation of the
Navajo word Tsékoh, meaning “rock-cut” or
“canyon” or Tzak aih, meaning “white string of
rocks.” (The latter refers to the appearance the
sandstone atop Chacra Mesa.)
1823
As José Antonio Viscarra led a military force
west from Jémez Pueblo onto Navajo lands, he
noted many fallen Chacoan buildings.
1849
The Washington Expedition, a military reconnaissance under the direction of Lt. James
Simpson of the Army Corps of Topographical
Engineers, surveyed Navajo lands, and wrote
accounts of Chacoan cultural sites. Attached to
the expedition, the Kern brothers produced
excellent illustrations of the sites for a government report.
1877
W. H. Jackson with the U.S. Geological and
Geographical Survey (headed by Ferdinand
Hayden) produced expanded descriptions and
maps of Chacoan sites. Jackson noted Pueblo
Alto and Chacoan stairways carved into cliffs.
No photos were produced, because he experimented with a new photographic film process
at Chaco, which failed.
1888
Victor and Cosmos Mindeleff of the Bureau of
American Ethnology spent several weeks at
Chaco surveying and photographing the major
Chacoan sites for a monumental study of
Pueblo architecture. Their photographs documented vandalism and looting. These photos,
the oldest known, provide the park with a starting point for determining the modern effects of
visitation, looting, vandalism, and natural collapse on these sites.
1896–1900
After excavating Mesa Verde cliff dwellings
(1888) and other ancestral Puebloan sites in the
Four Corners area, Richard Wetherill moved to
Chaco in 1896 to begin excavations at Pueblo
Bonito. The Hyde Exploring Expedition, led by
George H. Pepper from the American Museum
of Natural History in New York City, established full-scale excavations at Pueblo Bonito,
assisted by Richard Wetherill. Their main focus
was the accumulation of artifacts for the museum collection; and numerous crates of artifacts
from Pueblo Bonito they shipped to the museum, where they remain today.
1901
Richard Wetherill filed for a homestead deed
on land that included Pueblo Bonito, Pueblo
Del Arroyo, and Chetro Ketl. While investigating Wetherill’s land claim, General Land Office
special agent S. J. Holsinger described the
canyon’s physical setting and the sites, noted
prehistoric road segments, stairways, prehistoric dams and irrigation systems. His report
strongly recommended the creation of a national park to preserve Chacoan sites. The claim
was modified to exclude these major structures,
and it was not until 1910, after his death, that
the Wetherill family received the deed.
1902
Edgar L. Hewett of the School of American
Research, Museum of New Mexico, and
University of New Mexico mapped many
Chacoan sites.
1906
Hewett and many others helped to enact the
Federal Antiquities Act of 1906. Our nation’s
first law protecting antiquities, the Antiquities
Act was a direct consequence of the controversy
surrounding Wetherill’s work at Chaco. The law
also granted new powers to the President,
allowing him to establish Mesa Ver
National Historical Park
National Park Service
U.S. Department of the Interior
Chaco Culture
Backcountry Hiking Trails
Hiking permits are required for these trails. They are free and available at all trailheads and at the Visitor Center.
Trails are open from sunrise to sunset. Pets are permitted on leashes. Carry water, snacks, and sun protection.
Pueblo Alto Trail
Distance - Entire loop trail – 5.4 mi roundtrip (3-4 hours)
Pueblo Alto - 3.2 mi roundtrip (2 hours)
Pueblo Bonito Overlook – 2.0 mi roundtrip (1 hr)
Trailhead - Pueblo del Arroyo parking area
Elevation Gain - 250 feet
This trail provides spectacular overlook views of Pueblo Bonito, Chetro Ketl, and Kin Kletso, enters Pueblo Alto and
New Alto, passes by Chacoan stairways, ramps, and roads, and affords panoramic views of the San Juan Basin. This
trail is an excellent introduction into the Chacoan world. Add time to explore the sites.
Peñasco Blanco Trail
Distance - Peñasco Blanco roundtrip 7.4 mi (5-7 hrs)
Petroglyph Trail only roundtrip 3.5 mi (2 hours)
Supernova Pictograph roundtrip 5.8 mi (4-6 hours)
Trailhead - Pueblo del Arroyo parking area
Elevation Gain - 200 feet
The longest trail - relatively level - includes the Petroglyph Trail to view numerous Pueblo and Navajo petroglyphs and
historic inscriptions. The trail continues to the “Supernova” pictograph site and Peñasco Blanco, an unexcavated great
house with a unique oval design and a spectacular natural setting. Hot summer sun and soft sand can make this a long
and difficult hike. Carry plenty of water, snacks, and sun protection. Add extra time to explore the sites.
South Mesa Trail
Distance - Entire loop trail - 4.1 mi roundtrip (3-4 hrs)
Tsin Kletzin - 3.0 mi roundtrip (2-3 hrs)
Trailhead - Casa Rinconada Trail, Stop 10
Elevation Gain - 450 feet
This trail leaves from Stop 10 on the Casa Rinconada trail, climbs to a high point on South Mesa, and leads to the great
house Tsin Kletzin. Spectacular views of the surrounding landscape are visible at the site. The loop trail descends into
South Gap, follows the Chacoan South Roads, and re-enters the canyon near Casa Rinconada. Add extra time to
explore the site and enjoy the vistas.
Wijiji Trail
Distance - Wijiji roundtrip from parking area - 3.0 mi (2 hrs)
Wijiji roundtrip from campground - 3.2 mile (2 hrs)
Trailheads – Wijiji parking area and campground
Elevation Gain - Insignificant
This trail leads to Wijiji, a later-period Chacoan great house built around AD 1100. Wijiji differs from sites like Pueblo
Bonito and Chetro Ketl in that it appears to have been built at once rather than several building periods; with
exceptional symmetry and the uniform masonry. Wijiji lacks typical Chacoan features such as enclosed plazas and
great kivas. Add time to explore the site and visit a short (0.2 mile roundtrip) petroglyph spur trail.
EXPERIENCE YOUR AMERICA
07/08
Chaco Culture
National Historical Park
National Park Service
U.S. Department of the Interior
The Birds of Chaco – A Checklist
This list includes 131 species of birds whose occurrence in the park has been
documented in two inventories over a 30-year period.
Species followed by:
• c (common) are often seen, and regular park inhabitants.
• u (uncommon) are not often seen, but are regular park inhabitants.
• a (abundant) are frequently seen.
• o (occasional) are usually seen only a few times a season.
• r (rare) are seen only once every few years
• i (introduced) are non-native species.
• x (extirpated) are no longer present in the park, but exist elsewhere.
• * are recent single observations.
• In addition, subspecies and color morphs are listed below the species.
Please help us by reporting any sightings of rare or unlisted species. Please include photos or drawings if possible, and
send to: Division of Natural Resources, Chaco Culture National Historical Park, PO Box 220, Nageezi, NM 87037.
HERONS
___
Great Blue Heron r
___
Black-crowned Night-Heron r
AMERICAN VULTURES
___
Turkey Vulture c
DUCKS, GEESE, SWANS
___
Mallard x
KITES, EAGLES, HAWKS
___
Osprey x
___
Northern Harrier u
___
Sharp-shinned Hawk o
___
Cooper’s Hawk c
___
Swainson’s Hawk r
___
Red-tailed Hawk c
___
Golden Eagle u
CARACARAS, FALCONS
___
American Kestrel c
___
Peregrine Falcon r
___
Prairie Falcon u
PHEASANTS, GROUSE, TURKEYS
___
Wild Turkey x
QUAIL
___
Scaled Quail u
RAILS, GALLINULES, COOTS
___
Sora a
PLOVERS
___
Killdeer r
SKUAS, GULLS, TERNS, SKIMMERS
___
Franklin’s Gull r
PIGEONS, DOVES
___
Mourning Dove a
CUCKOOS, ROADRUNNERS, ANIS
___
Greater Roadrunner r
BARN OWLS
___
Barn Owl u
TYPICAL OWLS
___
Western Screech-Owl r
___
Great Horned Owl c
___
Long-eared Owl u
___
Short-eared Owl x
NIGHTHAWKS, NIGHTJARS
___
Common Nighthawk u
___
Common Poorwill u
SWIFTS
___
Black Swift *
___
White-throated Swift a
HUMMINGBIRDS
___
Black-chinned Hummingbird c
___
Broad-tailed Hummingbird c
___
Rufous Hummingbird r
WOODPECKERS
___
Lewis’s Woodpecker r
___
Williamson’s Sapsucker r
___
Red-naped Sapsucker u
___
Downy Woodpecker u
___
___
___
___
Hairy Woodpecker u
Northern Flicker c
Yellow-shafted
Red-shafted
TYRANT FLYCATCHERS; BECARDS
___
Olive-sided Flycatcher o
___
Western Wood-Pewee u
___
Willow Flycatcher o
___
Hammond’s Flycatcher o
___
Gray Flycatcher c
___
Dusky Flycatcher o
___
Cordilleran Flycatcher u
___
Say’s Phoebe c
___
Vermillion Flycatcher *
___
Ash-throated Flycatcher c
___
Cassin’s Kingbird c
___
Western Kingbird o
SHRIKES
___
Loggerhead Shrike c
___
Northern Shrike x
VIREOS
___
Plumbous Vireo o
___
Warbling Vireo u
JAYS, MAGPIES, CROWS
___
Western Scrub-Jay c
___
Pinyon Jay c
___
Common Raven c
LARKS
___
Horned Lark c
SWALLOWS
___
Violet-green Swallow o
___
Cliff Swallow a
___
Barn Swallow o
TITMICE
___
Mountain Chickadee u
___
Juniper Titmouse c
BUSHTITS
___
Bushtit c
NUTHATCHES
___
Red-breasted Nuthatch r
___
White-breasted Nuthatch o
CREEPERS
___
Brown Creeper o
WRENS
___
___
___
___
Rock Wren a
Canyon Wren u
Bewick’s Wren c
House Wren u
KINGLETS
___
Ruby-crowned Kinglet u
GNATCATCHERS
___
Blue-gray Gnatcatcher c
THRUSHES
___
Western Bluebird o
___
Mountain Bluebird u
___
Townsend’s Solitaire u
___
Hermit Thrush u
___
American Robin o
MOCKINGBIRDS, THRASHERS
___
Northern Mockingbird c
___
Sage Thrasher u
WAXWINGS
___
Cedar Waxwing r
SILKY-FLYCATCHERS
___
Phainopepla *
WOOD-WARBLERS
___
Orange-crowned Warbler u
___
Nashville Warbler o
___
Virginia’s Warbler u
___
Northern Parula x
___
Yellow Warbler r
___
Yellow-rumped Warbler u
___
Myrtle
___
Audubon’s
___
Black-throated Gray Warbler o
___
Townsend’s Warble o
___
Grace’s Warble r
___
Black-and-white Warble r
___
American Redstart x
___
MacGillivray’s Warble u
___
Wilson’s Warbler c
TANAGERS
___
Western Tanager o
SPARROWS
___
Green-tailed Towhee u
___
Spotted Towhee o
___
Canyon Towhee c
___
Cassin’s Sparrow o
___
American Tree Sparrow r
___
Chipping Sparrow a
___
Clay-colored Sparrow r
___
Brewer’s Sparrow c
___
Vesper Sparrow u
___
Lark Sparrow c
___
Black-throated Sparrow a
___
Sage Sparrow c
___
Lark Bunting r
___
___
___
___
___
___
___
___
___
___
___
Song Sparrow o
White-throated Sparrow o
White-crowned Sparrow u
White-lored
Black-lored
Dark-eyed Junco c
Slate-colored
White-winged
Oregon
Pink-sided
Gray-headed
CARDINALS, GROSEBEAKS
___
Black-headed Grosbeak o
___
Blue Grosbeak c
___
Lazuli Bunting r
___
Indigo Bunting r
___
Dickcisse r
BLACKBIRDS, ORIOLES
___
Red-winged Blackbird r
___
Western Meadowlark c
___
Yellow-headed Blackbird o
___
Brewer’s Blackbird r
___
Common Grackle x
___
Brown-headed Cowbird i c
___
Bullock’s Oriole o
___
Scott’s Oriole u
FINCHES
___
House Finch a
___
Pine Siskin r
___
Lesser Goldfinch o
___
Black-backed
___
Green-backed
___
American Goldfinch o
OLD WORLD SPARROWS
___
House Sparrow i c
WILDLIFE OBSERVATION:
DATE:
TIME:
WEATHER:
LOCALITY:
OBSERVERS:
Please include any photos or drawings. Thanks!
EX P E R I E N C E Y O U R A M
Chaco Culture
National Historical Park
National Park Service
U. S. Department of the Interior
Mammal List
ELK (CERVUS ELAPHUS) The elk herd
moved back into Chaco in the 1999.
Many opportunities arise to see the
estimated 60 resident elk throughout
the year. The best time to catch a
glimpse of the second largest cervid
in North America, howerver is in the
fall. Thanks to efforts made by the
state of New Mexico and private
individuals who strove to restore the
nearly extinct animal from 1910 to
1966, elk population estimates within
the state soar upwards of 72,000.
DESERT COTTONTAIL (SYVILAGUS
AUDUBONLI) The cottontail is one of
the most abundant mammals in
the park. You might get a
laugh seeing them sprawled
out in the summertime
around the parking lots and
prehistoric sites. Cottontails
conserve their energy and
moisture by avoiding activity in
the daylight hours. To provide
excellent warmth during the winter
months, the Chacoans wove cloaks
and blankets out of rabbit fur.
MULE DEER(OBDOCOLLEUS HEMIONUS) Mule
PORCUPINE (ERITHIZON DORSATUM)
This large rodent makes
periodical appearances
within the canyon.
Porcupines are
herbivores and love to
eat tree bark (having
the potential to strip
trees completely bare).
As with all animals in
the park, keep your distance
when viewing porcupines. They
don’t actually throw their quills, but
contact with the sharp objects can be
rather painful.
deer can be a little on the
shy side, but keep an eye
out for them around the
loop road and the washes.
Typically seen in the fall,
deer are most visible in the
early morning and late
afternoon. Population
estimates hover around 50,
but its exact size remains
unknown. The Chacoans utilized deer
bone for tools and ceremonial objects,
the meat for food, and hides for warmth.
COYOTE (CANIS LATRANS) These members
of the dog family are quite prevalent in
Chaco. You can see them running
down the road or prowling on top of
the mesas. If you’re lucky, you might
catch the unusual pairing of the
coyote and badger who often hunt
together. It might sound strange, but
this phenomenon has been reported
many times in the park especially around
the South Mesa. Many rock art panels feature
coyote images.
AMERICAN BADGER (TAXIDEA TAXUS)
The badger is an excellent
hunter and masters the skill
by digging lots of burrows
and capturing its prey with its
strong, sharp claws. Sometimes they will invade
another animal’s burrow,
wait for it’s return, and attack
the prey. You can see many
burrows along the South Mesa Trail
where you might see the earlier
described interaction with coyote.
Identify these mammals.
Have you seen any of these creatures in the park?
A.
(See reverse side for answers)
B.
C.
r/
d e on
O r mm
Co
m
Na
e
La
ORDER: ARTIODACTYLA
Elk
Mule Deer
ORDER:CARVIVORA
Coyote
Bobcat
Striped Skunk
Puma
American badger
Common grey fox
Black bear
Kit fox
tin
N
e
am
Ab
u
Cervus elaphus
Ocdoileus hermonius
nd
an
C
C
Canis latrans
Lynx rufus
Mephitis mephitis
Puma concolor
Taxidea taxus
C
U
U
U
U
Urocyon cinereoargenateus U
Ursus americanus
R
Vulpes macrotis
U
ORDER: CHIROPTERA
Pallid bat
Western lump-nosed bat
Big brown bat
Spotted bat
Silver-haired bat
Hoary bat
California myotis
Western small-footed bat
Long-eared myotis
Fringed myotis
Long-legged myotis
Yuma myotis
Big free-tailed bat
Western pipistrelle
Brazilian free-tailed bat
Antrozous pallidus
Corynorhinus townsendii
Epstisicus fuscus
Euderma maculatum
Lasionycteris noctivagans
Lasiurus cinereus
Myotis californicus
Myotis ciliolabrum
Myotis evotis
Myotis thysanodes
Myotis volans
Myotis yumanensis
Nyctinomops macrotis
Pipistrellus hesperus
Tadarida brasiliensis
/
er
ce
d
on
O r mm
Co
Na
me
tin
e
Ab
u
a
nd
ORDER: INSECTIVORA
Desert shrew
Notiosorex crawfordi
R
ORDER: LAGOMORPHA
Black-tailed jack rabbit
Desert cottontail
Lepus californicus
Syvilagus audubonli
C
C
Order: Rondentia
Antelope ground squirrel
Gunnison’s prairie dog
Ord’s kangaroo rat
Banner-tailed kangaroo rat
Porcupine
Colorado chipmunk
White-throated wood rat
Bushy-tailed wood rat
Stephen’s wood rat
N. grasshopper mouse
Plains pocket mouse
Silky pocket mouse
Brush mouse
Canyon mouse
Deer mouse
Pinyon mouse
Western harvest mouse
Spotted ground squirrel
Rock squirrel
Botta’s pocket gopher
C
U
R
R
U
R
C
C
U
C
U
U
R
C
U
La
m
Na
Ammospermophilius leucurus C
Cynomys gunnisoni
Dypodomys ordi
Dipodomys spectabilis
Erithizon dorsatum
C
C
C
C
Neotamias quadrivittatus
U
Neotoma albigula
C
Neotoma cinerea
U
Neotoma stephensi
U
Onychomys leucogaster C
Perognathus flavescens U
Perognathus flavus
C
Peromyscus boylii
U
Peromyscus crinitus
C
Peromyscus maniculatus A
Peromyscus truei
C
Reithrodontomys magalotis U
Spermophilis spilosoma R
Spermophilis variegatus R
Thomomys bottae
C
Legend
A = Abundant C = Common
R = Rare
U = Uncommon
Canyon Winged Friends
Pallid Bat
Fringed
Myotis
Big Brown Bat
Answers:
Chaco hosts a myriad of furry flying mammals. The
fringed and California myotis, Pallid b
Culture
National Chaco
Historical
Park
National
Historical Park
National Park Service
NationalofPark
Service
U.S. Department
the Interior
U.S. Department of the Interior
Chaco Culture
Reptiles and Amphibians
MEXICAN SPADEFOOT TOAD
(SPEA MULTIPLICATA)
Best seen on summer nights after rains, the
Mexican spadefoot toad is one of two spadefoot
toads located in the canyon. Look for rock art in
the park representing this amphibian.
EASTERN COLLARED LIZARD (CROTAPHYTUS COLLARIS)
These brightly colored (turquoise, yellow, and
black) lizards are a favorite of many park visitors.
Highly visible and very common in the park,
watch for these creatures near Pueblo Alto and
nearly all of the sites.
EASTERN FENCE OR SAGEBRUSH LIZARD
(SCELOPORUS GRACIOSUS)
Found in all of the habitats in Chaco, the fence
lizard is the most abundant lizard in the canyon.
You can see them climbing on rocks, at the
Chacoan buildings and around the Visitor Center.
TIGER SALAMANDER (ABYSTOMA TIGRINUM)
The tiger salamander occurs throughout the park
environs, but is not commonly seen. Their larvae
have been seen in pools of water in the Chaco
Wash.
PLATEAU STRIPED WHIPTAIL (CNEMIDOPHORUS VALOR)
Also very visible in the park, the whiptail can be
seen on many trails in the frontcountry and
backcountry.
WESTERN RATTLESNAKE (CROTALUS VIRIDIS)
Chaco does host a population of rattlesnakes!
Don’t be too alarmed, the snakes tend to be rather
shy. Watch for them in the summer months particularly along trails and sunning themselves on
paved roads. Avoid hitting them!
EXPERIENCE YOUR AMERICA
Amphibian and Reptile List
Chaco Culture National Historical Park is home to a wide variety of amphibians and reptiles. Some
of these are quite numerous and seen frequently by park visitors, while others are rarer and only seen
very occasionally. Please keep in mind while visiting that all wildlife within the park is protected in
accordance with the mission of the National Park Service. Be aware of wildlife and take care not to
disturb or harm it. This is particularly important when driving at night, when many animals such as
snakes are more active and at risk of being run over.
AMPHIBIANS
•
Tiger salamander (Abystoma tigrinum) - common
•
Plains spadefoot toad (Spea bombifrons) - uncommon
•
Mexican spadefoot toad (Spea multiplicata) - common
REPTILES
Lizards
•
Collared lizard (Crotaphytus collaris) - common
•
Side-blotched lizard (Uta Stanasburiana) - common
•
Lesser earless lizard (Holbrookia maculata) - common
•
Sagebrush lizard (Sceloporus graciosus) - common
•
Ornate tree lizard (Urosaurus ornatus) - uncommon
•
Plateau whiptail lizard (Cnemidophorus valor) - common
•
Greater short-horned lizard (Phrynosoma douglasii) - uncommon
Snakes
•
Gopher/bull snake (Pituophis melanoleucus) - common
•
Western rattlesnake (Crotalus viridis) - common
•
Western territorial garter snake (Thamnophis elegans) - uncommon
•
Striped whipsnake (Masticophis taeniatus) - uncommon
•
Glossy snake (Arizona elegans) - rare
•
Night snake (Hypsiglena torquata) - common
Source: Nowak, E.M., and Trevor B. Parsons. 2008. Inventory of Amphibians and Reptiles for Twelve
National Parks in the Southern Colorado Plateau Network. Final Report to the National Park Service,
Southern Colorado Plateau Network, Flagstaff, AZ.
Chaco Culture
National Historical Park
National Park Service
U.S. Department of the Interior
Fossils from the Cretaceous Sea
A l l d r a w i n g s b y J a n e K o l b e r.
Revised 01/2006
T h i s p u b l i c a t i o n w a s p r i n t e d w i t h f u n d s d o n a t e d b y We s t e r n N a t i o n a l P a r k s A s s o c i a t i o n .
e x p e r i e nc e yo u r a m e r ic a
Chaco Culture
National Historical Park
National Park Service
U.S. Department of the Interior
Pre-Columbian Chocolate Discovered at Chaco
Dr. Patricia Crown examining a
cylinder jar, photo courtesy of
UNM Today.
Though the National Park Service rarely sponsors archaeological excavations
today, archaeologists and other researchers are still learning new things from the
material remains of ancestral Puebloan culture all the time. Technologies like
LiDAR photography (an optical remote sensing technology) and ground
penetrating radar give us new eyes on the resources at Chaco. Very recently
evidence of cacao (chocolate!) was
discovered in cylinder jars, a pottery style
found almost exclusively in Pueblo
Bonito, using a tiny sample of ground
pottery sherd. The process is called
organic residue analysis.
In the late 1800s Richard Wetherill and his
assistant George Pepper, the first archaeologists to work in Chaco, excavated
111 cylinder jars from one particular room at Pueblo Bonito. These men knew
they had found something special, though they could not have imagined what
we would learn from the jars more than 100 years later. Over the course of
subsequent excavations, archaeologists have gained a deeper understanding of
just how unique these vessels are. Fewer than 200 have been found in the
entire American Southwest, including those in Room 28 at Pueblo Bonito.
Scholars have long known that a drink made from cacao was consumed in
Roasted cacao bean, photo courtesy
of Sifu Renka.
ancient Mesoamerica. Some Maya cylinder jars even incorporate paintings of
the precious liquid being poured for rulers and gods, though average people
sometimes consumed it as well. The Maya ground
the beans; mixed them with spices, chilies, and
water; and frothed the drink for consumption either
hot or cold.
Most of the jars found in the famous cache at Pueblo
Bonito are more than twice as tall as they are wide
and painted with black designs on a white
background. Because of their distinct shape and
exclusive locations, archaeologists have typically
agreed that they were used ritually. Ideas about their
use include that they were storage for turquoise or
prayer sticks, or that animal skins were stretched
over them to create drums. Almost all of these jars
are housed today in the American Museum of
Natural History in New York City, making
prolonged study logistically difficult.
Cylinder jars from Pueblo Bonito, photo courtesy of the American
Museum of Natural History.
From 2004-2007 a University of New Mexico (UNM) research project re-excavated the trenches first dug in Pueblo
Bonito’s middens under Neil Judd in the 1920s. Of the hundreds of thousands of pot sherds that were recovered,
archaeologist Patricia Crown selected five for her research. She is a
ceramics specialist at UNM’s Department of Anthropology. She designed
the project, and W. Jeffrey Hurst from The Hershey Center for Health and
Nutrition performed the research. They chose five pot sherds for organic
residue analysis, three of which were likely from cylinder jars. The pieces
date to between 1000 and 1125 AD based on their decorative styles.
Only the three sherds most likely from cylinder jars exhibited trace
theobromine, a conclusive indicator of cacao or chocolate. The implications
of this find are extraordinary. The cacao plant grows only in certain tropical
climates, and the nearest possibility for Chaco is Central Mexico. We
already know the Chacoan people traded with Mesoamerican cultures for
exotics like copper bells and Scarlet Macaws, but cacao suggests a more
ritual connection than other Mesoamerican goods. In some Maya
ceremonies a cacao beverage was frothed by pouring the liquid from one
vessel to another. Likewise, the cacao found at Chaco was probably in
liquid form because the residue had absorbed into the clay itself. Further,
the limited distribution of the cylinder jars could be evidence that only an
elite or small segment of the population consumed the beverage.
Jar from Central Maya area with cacao
glyph, photo courtesy of Mary Harrsch.
Today nearly every visitor to Chaco leaves the park remembering
Pueblo Bonito because of its size and level of preservation and
excavation. Perhaps the building had special importance in the Chacoan
world as well. So far, all indication of precious chocolate has been
associated with that site.
Excavations at Pueblo Bonito in 2007, NPS photo
In a few years we may have yet another picture of trade and ritual
activity in the ancient Southwest. Crown and Hurst recently received a
National Science Foundation (NSF) grant to test 300 more pieces of
pottery for theobromine. Not only are they expanding the sample size
of cylinder jars to include those in the American Museum, but they are
broadening their geographic scope. The researchers are testing
distinctive pottery representing the Mogollon and Hohokam cultures as
well.
Research today looks very different than it did under Wetherill and the early pioneers of archa