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Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado

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Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado By Robert B. Scott,1 Anne E. Harding,1 William C. Hood,2 Rex D. Cole,3 Richard F. Livaccari,3 James B. Johnson,3 Ralph R. Shroba,1 and Robert P. Dickerson 1 Prepared in cooperation with the National Park Service and the Colorado National Monument Assoc iation Pamphlet to accompany Geologic Investigations Series 1-2740 2001 1U .S. Geological Survey, Denver, CO 80225 2515 Dove Court, Grand Junction, CO 81503 3Department of Physical and Envi ronmental Sciences, Mesa State College, Grand Junction, CO 81502 U.S. Department of the Interior U.S. Geological Survey '"' ___ -·- . ' . -·~ ~-·-·- - .... ~ ~ . .,_ . .. _.. --- . - .... ~ . .. ... _... Contents ~~.fst~t:.~.r.~ ....::ff-1@;;.·~~~/'-~~tiL'·;-~:C' ... _;-;<f;:~~t~~~ .. !t.;.'!'J.~t:~..,.l'... ~..... -;;.~ ........."" ·. .. ·,.--..,¢ ~· :~ ~· ·'f,.v~~ ....... ,~:;~..,~---.A:~*' Description of map units................................................................ .......................................... .......... ...................................................... 1 Introdu ction ... ..... ... ... .. .. ... .. .. .... ........ ... ... ........ .... .... .. ............ ... .... ... .............. .. ... ..... .. .......... ..... ........... ... ..... ...... ... .. ... .... ... .... .... ............ 1 Surfi cial un its .. ... .. ........ ........... .... ....... ...... ........................ ... ... .... .. .. ........ .. .... .... .. ... ....... .. ... .... .. ...... .. .. ... .. ....... ...... ... ... ... .. .. ... ... .... .... .... 3 Artificial -fill deposits........... ..... .... .. .. ... ... ...... .. ... .. .... ...... .... .. ........... .. ....... .... .... .. .. ........................ .. .... ...... .. ... ... ... .. .. .. ...... ... .... ... 3 Artific ial fill. ... .. .. .. ..... ... ........ ... ... .. .. ... ..... .. .. ....... ... ..... .. ......... ...... ... ..... ... ... ....... .. ........... .. .... ...... ..... .. ... ... ..... .... .. ... .. ... .... .... ...... 3 Alluvial deposits .. ... ......... ... .. .... .. .. ..... ....... .. ... ... ... ... ... .... ... .. .... ..... ..... .... ....... ..... ....... .. .... ... ........ ... .. .. ... .. ... ......... .... ..... ... .. .... ...... 3 Alluvium .. .. .. .... .. ... .. ....... .......... ........ ... ..... .... .. .... .. ... ..... .. ..... .. ...... .............................. ... ....... .... .. .. ... .. ... .... ......... ... .. ............. .. ... 3 Flood-plain and stream-channel deposits ...... ... ......... .. .. .......... ... ..... .... ... .. .... .... ... .. .. ..... .. .... .. ... ........ ..... .... ...... .... ... .. ... .... 3 Valley-fill depos its ... .... .. .. ..... ... .... .. ... ... .. .. ........ ... .... .. ... ....... .................. ........ ... ... ... .... .... ............. .. ... .. .. ..... .... .......... ... .......... 4 River-gravel deposits .. ...................... .. .. ..... .. ... ... ... ... .... .. .. .. ...... .............. ...... ...... ..... .. ... ... ... .... ... ... .... .... ........ .. ............ ... ...... 4 Alluvial and colluvial deposits... .. ..................... ... .. ... .. ... ... .. .. ...... .. .. ... ... .... .. .......... ... ......... ... .. .. .. .. ... .. .. ..... ........... ........... ... ... .. 5 Young fan- all uvi um and debris-flow deposits .. ... .. ............................ .... ...... ... ..... ... ... .. .... ...... .... ... ...... ..... .. ...................... 5 Younger alluvial-slope deposits ... .. .. .... ......... .... .. .. .... .......... .. ... .. ......... ............. .... .... .. .. .. .. .. ...... ........... .... ... ........ ... ... ......... 5 Older alluvial-slope deposits. .. .. ... ..... .. ... ... .... ........ .. .. .... ... ..... ... .. ... .. .. .. .. .. ... ... ........ .. .... ..... .. ... .. ... ..... ... ...... ... ... .... ......... ... .. 6 Local gravel deposits. .. .. ... .. ... ............ ... .... .... ... ..... .... ... .... .. .. ..... ... .... .. ... .. .. .... .. ... ...... ... ...... ........ .. ........ ....... ... ....... .... .... ....... 6 Col luvia l deposits.. ............ .. .. ...... .. .. .... .. .. .... ...... ...... ...... ... .... .... .. ........ .... ..... ... ... ........ .. ..... ...... .. ...... ....... .. .... ... ........... ... ..... .... ... 7 Coll uvium , und ivided ..... .... ..... ...... ... ... .... .. .... ... .. .... ... .. ....... ... ... .. ..... .. .. .. .. ... ...... .. ... .... .... .... ... .... .. .. .. .............. .. ....... ..... ..... .. ... 7 Rockfall deposits............ .... ............. ..... .... ... .. .... .... .... ... .... .. ... .. .... ..... .. .. ........ ........... ... ...... ..... ..... ..... .... .... .... .. ... .. ... ......... ... .. 7 Younger landslid e deposits .... .. ............. .. ..... ..... ... .. .. .... .. ...... .. .... ........ .... .... .. ... .. .. .. ... .. ... ... .... ...... ... ... .. .... ...... .... .... .. ... ..... .. .. 8 Older landslide deposits ... ..... ... ....... .. .. .. .. .. .. ... ... .... ......... .. ... ....... .. .... ........ .. .. ..... ... ....... ... ... ......... .. ... ........ .. .. .. .. ...... ..... .. .. ... 8 Sheetwash deposits. .. .. .. ...... ...... .. ... .. .... .... ... ...... .. .. .... .. ... ... ....... ... .. ..... ....... .. .. ... .. ........ .. ... ........... .. ... .. .. .... ..... ...................... 8 Eolian deposits... ....... ... .. .. .. .. .. .. ....... ... .... .. ... .... ............. .... .. .... ... ........................................... ... .. ... ...... ........ ........................ .. ..... 9 Eolian sand ..... .. ..... ........ .... .......... .... ........ ... .. ... .. .... ... ... .......... .......................................... ... .... .. ........ ... .... ... ... .. .. .. ... ... .. ...... .. .. 9 Eolian and colluvial deposits .. ... ................... ... ... ... ..... ........... .... .. .... .... ............ .. .. .. .. .. ... .... ... .. ......... .. .. .. ... ....... .. .. .. ...... .. .. ...... .. 9 Eolian sand and sheetwash depo sits ... .. ... ... ..... ......... .. .... ... ... ... .. .. ....... .. ....... ... ..... .. .. ... .... .. .. ... ... .. .. .. ... .. ........ .... ......... ...... 9 Marsh dep osits...... ........ .. .. ... ....... ... .. ........... ... .. ... .. .. .. .. .... ..... ... ..... .. ... .. ... .... .... .... .. .... .. ........... ... ..... .. ................ ..... ........ ... ......... 9 Ciena ga depos its ... ... ..... ... .... ... .... ... ............ .. .. ... ... ....... ... .... ....... ... .... ..... .. ..... .. .... ...... ... .... ....... ... .... ... .. .... .... ... .. ............ ....... 9 Bedrock units ... .... ...... .. .. ........ .. ...... ...... .. ....... ....... .......... .. ... .. .. .. ..... ... ..... .. .... ... ...... ... .... ... ... .... ... .... ... .. ...... .... .... .. ....... ... .. .. ........ .. .... ... 10 Mancos Sha le ... ........ .. .. .... .. .. .. ....... ... .... .. ...... ..... .. .... ..... .. .. ...... .. ...... ........ .... .... .. ... ........ ....... ............ ..... .... .... .......... ... ...... ... .. 10 Dakota Formation ..... .. .. .. .. .... .. ................. ... ... ... ... .. .. .. ....... ... .... ....... .. .......... .. .. .. .... .... .. ......... .. ....... .. ... ... ... .. .. ... .... .. .... ...... .... 11 Burro Canyon Formation .. ........... ..... .. ... .. ... .. ... .... .... .................................. .... .. ..... .. ........................ .. ... ... .... ...... .. .. ..... .. ...... 12 Morrison Fo rmation ... ... .. .. .. .. ... .. .... .. .. ...... ... .. .... ..... .. .. ... ..... ... ... .... .. .. .... ... ..... ... ... ... .... .. .... ... ....... .. .. .... ........ ...... .. ...... ... ... .. ..... 12 Brushy Bas in Member ...... ... .. ..... .... .... ..... ...... .. .... .. .. .... ... ......... .... .. .. ..... .. ..... ... ... .. .... .... .... .. .... ... .... ... .. .. .... .... .. ... ... ....... .. 13 Salt Wash Member. .. .. .. ... ... ..... .... ... ... .... .. .. ........ ....... .... .. ... .. ........ .... ... ...... ........... ... .. ........ ........... ..... ... .... .. .... .. .. ... .. .. .. .... 14 Tidwe ll Membe r. .. ... ... ... .. ...... ....... .. .. ...... ... .. ... .. ... ... ..... ... .. ... ..... ... ..... .. .. .......... ..... .... ... .. ... ... .. .. .. ..... ........ ...... ... ...... .. .. ... .. ... 14 Wanakah Formati on ... .... .... .. .... .... .... .... ................................................................. .. ... ... ..... ..... .... .. ... .... .. ........... .. ... ..... ... .... 16 Entrada Sandstone .... ..... ...... ...... ... .... .. ... ... ..... ... ... .. .... ....... ... .. .. ........ .... .... ...... ... .. .. .. ... .. ... .. ... ..... ... ...... ......... ... .... ... ... ... .. .. .... 16 "board beds" unit .. .. .. ......... ....... .... .... ..... .......... .... .... .. .. .... ... .. ...... .. ... ........ .. .... ...... ... ....... .... .. .... .. .... .. .. ......... .. .... ......... ...... 16 Sl ick Roc k Member.. ... ...... ............ ... ...... .... .. .. .... ... ..... .... .. .... ........ .... .... .. ... ..... .... .... ..... .. ...... ..... ... .. ..... ... .. ... ...... .... .. .. .... ... 17 Wana kah Formation and Entrada Sandstone, undivided .... .. .. ... ... .. .. .... .. ... ...... .. ............... .. ... ... ..... .. .... .. .. ................ ..... 17 Kayenta Formation .. .... ... ... .. .... .. ..... ......
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