Montezuma Castle National Monument Geologic Resources Inventory Report
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National Park Service U.S. Department of the Interior Natural Resource Stewardship and Science Montezuma Castle National Monument Geologic Resources Inventory Report Natural Resource Report NPS/NRSS/GRD/NRR—2019/2022 ON THE COVER Photograph of Montezuma Castle (cliff dwellings). Early in the 12th century, ancestral Native American people called the “Southern Sinagua” by archeologists began building a five-story, 20-room dwelling in an alcove about 30 m (100 ft) above the valley floor. The alcove occurs in the Verde Formation, limestone. The contrast of two colors of mortar is evident in this photograph. More than 700 years ago, inhabitants applied the lighter white mortar on the top one-third. In the late 1990s, the National Park Service applied the darker red mortar on the bottom two-thirds. Photograph by Katie KellerLynn (Colorado State University). THIS PAGE Photograph of Montezuma Castle National Monument. View is looking west from the top of the Montezuma Castle ruins. Beaver Creek, which flows through the Castle Unit of the monument, is on the valley floor. NPS photograph available at https://www.nps.gov/moca/learn/photosmultimedia/ photogallery.htm (accessed 22 November 2017). Montezuma Castle National Monument Geologic Resources Inventory Report Natural Resource Report NPS/NRSS/GRD/NRR—2019/2022 Katie KellerLynn Colorado State University Research Associate National Park Service Geologic Resources Inventory Geologic Resources Division PO Box 25287 Denver, CO 80225 October 2019 U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Fort Collins, Colorado The National Park Service, Natural Resource Stewardship and Science office in Fort Collins, Colorado, publishes a range of reports that address natural resource topics. These reports are of interest and applicability to a broad audience in the National Park Service and others in natural resource management, including scientists, conservation and environmental constituencies, and the public. The Natural Resource Report Series is used to disseminate comprehensive information and analysis about natural resources and related topics concerning lands managed by the National Park Service. The series supports the advancement of science, informed decision-making, and the achievement of the National Park Service mission. The series also provides a forum for presenting more lengthy results that may not be accepted by publications with page limitations. All manuscripts in the series receive the appropriate level of peer review to ensure that the information is scientifically credible, technically accurate, appropriately written for the intended audience, and designed and published in a professional manner. This report received informal peer review by subject-matter experts who were not directly involved in the collection, analysis, or reporting of the data. Views, statements, findings, conclusions, recommendations, and data in this report do not necessarily reflect views and policies of the National Park Service, U.S. Department of the Interior. Mention of trade names or commercial products does not constitute endorsement or recommendation for use by the U.S. Government. This report is available from the Geologic Resources Inventory website, and the Natural Resource Publications Management website. If you have difficulty accessing information in this publication, particularly if using assistive technology, please email [email protected] Please cite this publication as: KellerLynn, K. 2019. Montezuma Castle National Monument: Geologic resources inventory report. Natural Resource Report NPS/NRSS/GRD/NRR—2019/2022. National Park Service, Fort Collins, Colorado. NPS 309/165271, October 2019 ii Contents Executive Summary ................................................................................................................................................ix Products and Acknowledgments ...........................................................................................................................xi GRI Products ................................................................................................................................................................................................. xi Acknowledgments ....................................................................................................................................................................................... xi Geologic Setting and Significance ..........................................................................................................................1 Park Establishment and Setting ................................................................................................................................................................... 1 Regional Geologic Setting ............................................................................................................................................................................ 3 Geologic Features and Processes ............................................................................................................................9 Early Proterozoic Rocks ................................................................................................................................................................................. 9 Paleozoic Rocks ............................................................................................................................................................................................. 9 Hickey Formation .......................................................................................................................................................................................... 9 Verde Formation ........................................................................................................................................................................................... 9 Terrace Gravel and Alluvium ...................................................................................................................................................................... 13 Wet Beaver and Beaver Creeks .................................................................................................................................................................. 13 Montezuma Well ......................................................................................................................................................................................... 15 Paleontological Resources .......................................................................................................................................................................... 18 Geologic History .....................................................................................................................................................21 Geologic Resource Management Issues ...............................................................................................................23 Cave and Karst Resource Management ..................................................................................................................................................... 24 Climate Change ........................................................................................................................................................................................... 26 Fluvial Features and Processes .................................................................................................................................................................... 28 Geothermal Resources ................................................................................................................................................................................ 30 Groundwater Withdrawal .......................................................................................................................................................................... 32 Illegal Rock Collection ................................................................................................................................................................................ 34 Oil and Gas Reserve .................................................................................................................................................................................... 35 Paleontological Resource Inventory, Monitoring, and Protection ........................................................................................................... 36 Quaternary Faults and Earthquakes .......................................................................................................................................................... 38 Slope Movements ........................................................................................................................................................................................ 40 Geologic Map Data ................................................................................................................................................43 Geologic Maps ............................................................................................................................................................................................. 43 Source Map 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