Colorado National Monument National Park Service Colorado U.S. Department of the Interior Geologic Units Geologic Map of Colorado NM af - artificial fill Qa Qal - alluvium Km Km WATER Km af Qalc1 - youngest alluvium deposited by the Colorado River Qaso Km Km Qfp Qfp Qac Qpwf Jk Qfp Jk Qa Qalg - youngest alluvium deposited by the Gunnison River Qse Qac Qaso Qasy Qpwf Jwg Qfp Xm Qfp Qsw Qa af Qpwf Qac Qfy - younger fan-alluvium and debris-flow deposits Kb Qlso Qfy Km Jwg Qc Qpwf Qpwf af af Qpwf Qse Qlsy - young landslide deposits Qr Jk Jmb Qfp Qpwf Qlso Jms Qr Qaso Qac Jwg Xm Qfp Qcg - Cienaga deposits Qse Jk Qa Km Km Qfp Qpwf Jk Jmt Qaso Qfp - floodplain deposits Qaso Km Jeb Qal Qse Qse Jw Qa - alluvium deposited by tributary streams Qr Qvf - valley fill deposits Qa Jwg Qpwf Qr Jwg Qfp Qc Qalc2 - oldest alluvium deposited by the Colorado River Jmt Qr Qalc1 Jwg Qaso Qr Qc - colluvium Jmb Qcg Km Km Jw Jwg Xm Qalc1 Jmt Jk Xi Qac - alluvium and colluvium, undivided Jms Jmb Qaso Qse Qalc1 Qac Qsw - sheetwash deposits Qr Qac Jmb Km Qalc1 Jwg Qse Qcg Qe - eoilian deposits Xm Jmb Qse Qalc1 Qr Qalc2 Qlso Qaso Qse - eoilian and sheetwash deposits Jeb Jwg Jwg Jms Kd Qalc1 Qalc1 Qr - rock-fall deposits Jmb Qe Jmb Kb Qlso Qvf Kd Qalc1 Qa Jmt Qal Qse/Qt30 - eolian sand and sheetwash deposits Qr Qr Kd Jes Qt30 Jwg Qc Jmb Qr Kd Kd Kd af Qasy - younger alluvial-slope deposits Jk Qalc1 Qr Qfy Qlso Qac Qse Qt30 Jmt Qse Qac Qaso - older alluvial-slope deposits Kb Kd Jes Jwg Jmb Jmb Kb Qfy Jwg Qe Qpwf - pediment deposits of Walker Field Qe Qalc1 Kb Qlg/Qt30 Qalc1 Qrg - river-gravel terrace deposits af Jmb Kd Jmb Jwg Qse/Qt30 Qse Qfy Qalc1 Qlg - local gravel deposits Jms Qe Qse Qalc1 Jmb Qalc1 Qvf Qe Qr Qal Qalg Qse Qse Kb Qtgu - terrace alluvium of the Gunnison River, undivided Jwg Xi Jk Qse/Qt30 Jmb Km Qr Jmt Jmb Qa Qlso - old landslide deposits Kb Qse Xm Qc Qalg Qfy Jmb Qlg/Qt30 - local gravel deposits Jw Qt30 Jwg Jmb Qse Qr Jmb Jmt Qe Qr Qt- terrace alluvium Qse Kb Jk Jmb Qr af Jms Qr Jk Qalg Qtc/Qtg Qe Xi Qse Kb Jwg Qt100 Km - Mancos Shale Qe Qvf Jwg Xm Qlso Jmb Km Qr Qr Qe Jwg Qfy Xi Jms Kd - Dakota Sandstone Qr Jes Qse Jw Qr Qlso Qalg Qac Qlso Qalg Kb - Burro Canyon Formation Jwg Qr Qse Jeb Xm Kd Jes Jes Qfy Qe Qr Jmb Qse Qalg Qalg Qse Qse Qvf Qtgu Jmb - Morrison Formation, Brushy Basin Member Jmt Kd Qr Jmb Qe Kd Jw Km Jms - Morrison Formation, Salt Wash Member Jmt Qse Jwg Qr Qlso Qalg Qse Qt100 Jmt - Morrison Formation, Tidwell Member Jmb Qse Qtc/Qtg Qe Jes Qfy Qse Qc Jes Jw Jw - Wanakah Formation Jeb Jw Jmt Qlso Jes Jmt Qse Jeb - Entrada Sandstone, 'Board Beds' unit Qr Qse Qse Jw Kd Jeb Qse Qac Xm Jmb Qlso Jes - Entrada Sandstone, Slickrock Member Qse Jeb Jw Qse Jmt Qr Qc Jw Qse Qr Jk - Kayenta Formation Jmt Jeb Kb Qe Kd Jwg Jmb Kb Jeb Kb Qlso Jwek - Kayenta, Entrada Sandstone, and Wanakah Fms. Jeb Qlso Qr Kd Jes Jeb Qlso Qr Jwg - Wingate Formation Jwg Jeb Jmt Qse Jeb TRc - Chinle Formation Jw Jmt NPS Boundary Mine Point Features Linear Dike Units Qvf Qse à Xi - meta-igneous gneiss Jk prospect pit lamprophyre dikes Qe Qe Qe Xm - migmatic meta-sedimentary rocks Jw Attitude and Observation Points Folds Landslide Escarpment Lines Jwg o strike and dip of beds known or certain known or certain WATER Qe s strike and dip of overturned beds approximate Geologic Contacts Qe Qse Qe e known or certain Jmt Qse horizontal beds concealed Qse Jmt p @ @ Qe approximate Jeb approximate strike and dip of beds concealed, queried The original maps digitized by NPS staff to create this product were: Qe Jeb Qe ¦ Qse concealed Qe strike and dip of foliation Faults Scott, Robert B., Harding, Anne E., Hood, William C., Cole, Rex D., Livaccari, Richard F., Johnson, James, Qlso ¨ B., Shroba, Ralph R., Dickerson, Robert P., 2001, Geologic map of Colorado National Monument and strike of vertical foliation known or certain inferred adjacent areas, Mesa County, Colorado: U.S. Geological Survey, Geologic Investigations Series I-2740, ® dip of fault plane approximate quadrangle/map boundary 1:24,000 scale. concealed water/shoreline U upthrown side of fault Scott, Robert B., Carrara, P.E., Hood, William C., Murry, K. E. 2002 Geologic Map of the Grand Junction Quadrangle, Mesa County, Colorado. U.S. Geological Survey; Miscellaneous Field Studies Map MF- 0 1.5 3 6 D downthrown side of fault inferred Kilometers 2363, 1:24,000 scale. F fault down-thrown block indicator Digital geologic data and cross sections for Colorado National Monument, and all other digital geologic data Å 0 1 2 4 strike of approximately vertical joints prepared as part of the Geologic Resources Divisions Geologic Resource Evaluation program, are available x online: http://www2.nature.nps.gov/geology/inventory/gre_publications.cfm Miles • strike and dip of beds, inferred Produced by Geologic Resources Division February 2006.