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• i• ~ <br />CONTENTS <br />UNITED STATES DEPARTMENT OF THE INTERIOR <br />STEWART L. UDALL, Secretary <br />GEOLOGICAL SURVEY <br />Thomas B. Nolan, Director <br /> Peer <br />Abstract.._... ................................. ..... 129 <br />Introduction..__ ______________________________________ 130 <br />I.ocntion and extent of coal field_________________________________ 130 <br />Purpose and scope of report_____________________________________ 130 <br />Fieldwork and ack now9edgmenls ................................ 131 <br />Previous work_________________________________________________ 132 <br />Ceogrnplty________________________________________________________ 134 <br />Lnnd fentures--_--'----------------------'-.------__--_----._ 134 <br />Drainage ....................'---'-- -'------'-'---- ---'_._._ 135 <br />Climate.- "--'-'------'-'-'-'------....-'-'-'--------'-'-.... 136 <br />VegeLation .................................................... 136 <br />Utility. "-'-------""'--"-'-'--.-..'-------------'.__...... l37 <br />Settlement-------------------------------- .-._.-. _.. 138 <br />Transportntion and acceseibility___________ ______________________ 138 <br />Sedimentnry rocks-------------------------'-.-.--.-.-------------- 139 <br />Mesozoic rocks-------' ........... .................... ......... 139 <br />Rocks of Cretaceous age____________________________________ 139 <br />Trinidad sandstone_________________________ ___________ 139 <br />Vertnejo fonnotion_____________________________________ 140 <br />Mesozoic end Cenozoio rocks____________________________________ 14l <br />ltocks of Cretaceous and Tertiary age____ __ __________________ I4l <br />Rntott formetion______________________________________ 141 <br />ltocks of Tertiary age_______________________________ _______ 143 <br />Poison Canyon fonnntion_______________________________ l43 <br />Cticlteraformation____________________________________ 144 <br />H uerfnno(7)formatiat_________________________________ 144 <br />Ueposila of Qunternary nge_________________________________ 145 <br />Metntnorltltic rocks________________________________________________ I4G <br />Igneous rocks... ________ ______________________________ 14G <br />Stocks-----'---'--'-'-'--------------------'------'-'---~---- 147 <br />Lnccolith_____________________________________________________ 149 <br />Plugs________________________________________________________ l49 <br />Uikes------------- - -'----'-'--------------------------- - --- 140 <br />Sills-----------'--'-'---------'-'---'-----------'---._.... 150 <br />Geologic atnmturc_________________________________________________ I51 <br />Thmst fcults-------------"'-'-"'----_'-..-.-.-...."--'-- 152 <br />Normalfnulls .................... .... .. ...........'---'-.-'-_. l52 <br />Folds------'------------- "-._... --~---.-...-'--...-'-'...-- 153 <br />nr <br />For eels 6y the Superintendent of Docu mente, U.S. Gorernmrnt Prlntlnq Ogles <br />Weehington ZS, D.C. <br />