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<br /> <br />o <br />I <br />o <br /> <br />10 <br /> <br />20 30 <br /> <br />40 MILES <br />I <br /> <br />10 20 <br /> <br />1 I <br />30 40 KILCMETERS <br /> <br />EXPLANATION <br /> <br />ERA DURATION SYMBOL AND FORMATION <br />(MILLIONS OF YEARS) <br /> k '!v: ~ Tertiary volcanics <br /> 1+ -tu+1 Uinta Formation <br />Cenozoic 83 _ Green River Formation <br /> I ~\~-~ I Wasstch. Formation <br /> ED Green River and Wasatch <br /> .... Formation, Undivided <br /> FKmv~ Mesaverde Grou.p <br />Mesozoic 177 ~~K~~ Mancos Shala <br /> I ~~tjJ Cretaceous, Jurassic, and Triassic <br /> ,I sedimentary rocks <br />Paleozoic 330 l. h: ~ Permian and Pennsylvanian <br />sedimentary rocks <br /> <br />CONTACT <br /> <br />Figure 2.1-1.--Generalized bedrock geology. <br /> <br />9 <br /> <br />2.0 GENERAL FEATURES <br />2.1 Geology <br />