32" 



^ 

 ^ 



liO'^ 



Co 



■JO" 



O 



o 



N 

 O 

 (0 

 UJ 



w 



D 

 O 



LJ 



< 



I- 

 UJ 



oc 

 o 



I 



MARINE EOCENE 



Gulf, and estuaruK- itepnsifs ,,/ l/i ,- 

 Aiississifipt em h,i vnn'n/ \f,,f>f„-,l witJi 

 Kiirlu'i D'l linry'nn I'milir ( 'o,isf niul 

 in Ci'nlrnl Anititira) 



5bl 



CONTINENTAL EOCENE 



fhiffVD.Fo/t tJnuin, Wusafilijif^m 

 Nivci; tiridgPT; and Uinla oftAe 



EOCENE AND OLIGOCENE 

 iMa/nie <//yy<<.s7/.s' <>/'( I'lihid Aiin-nrn , 

 Wi\st Indies, and I'aiifi^- (aa^l :<i>al 

 /n'oriii// l'n</,-l ,ind /u-nai I'l'l'itrilii- 

 ( 'oiiNl . Mtip/,,;! s,/iariih-iy ,>/i fhrAtltin 

 III- and (ral/'iiia.slxj 



EARLIEST TERTIARY OR LATEST 

 CRETACEOUS 



(S/ais/ioiK', Den vi'r a/id Ara/ia/nic. 

 I 'I'pei- l.araittu\ "( 'ei;Uops',j/'Son>ber 

 Iteils. andJ'Jd/ntin/on <>t the Inturior) 



UPPER CRETACEOUS 



(htmiUin (<) Majiasipian o/'tJu- At/an/if. 

 7}/sia/t»tsa to Ripley of the e<istein 

 Old/; Ka;jle Foi d toNavarn, a/the 

 western Cridf-DaJujta toFaxHdls of 

 the Iniertoi: Chuxy of'thePojcifieMon 

 tana rcaal bearing portion) and Laraniu 

 of the Roeky Mouittains and Great 

 P/^uns ninpped separately) 



Bork\' MoimtainH Ptn\'inr<> 



< 



LATE UPPER CRETACEOUS 



LARAMIE 

 (LMiunie of ' the Den vei Basin./.owe/ 

 L<iratnie"of' southern Wvorniiiy:<-o<il 

 bearing equivalents in Colorado and 

 NewMe.xicol 



7a 



MONTANA (COAL-BEARING PORTION) 

 /Mesa verde. Eagle . I laggell. , luditli 

 Kive*,atul equivalents of the Roeky 

 \^ Mounttiins and northern Great Plainsj 



LOWER CRETACEOUS 



( f'ldonuie ol ttie AdanUe slope, C 'omanehe 

 series of Te^vas an d.Me.vieo: KniKvviUe 

 and Horsetown oftlie Pa citie, Kootenai 

 of the nxjifjient Roeky Mo untauis) 



\ 



24 



9a I 



I 



^i^ J 



JURASSIC 



(Maf^iru: deposils <d Nevada, falilbrnia. 

 ondMe-xico, inelading Franciscan and 

 Alarif^iosa Elsewhere mapped with the 

 TrifUssiA^) 



tiivf'-'iffSS^ 



\ 



n 



Cab 



oSs 



-■"ada/c 



Jpe/ 



TRIASSIC 



(Maruie deposits of western AVo/tti ^baerica . 

 Ah^vu -o. andthji Arctic , red beds of 'Ihca s. 

 New Me.xico.andMeji:iroiNewark group 

 of the Atlantic Coast.Marinc Triassic 

 in Catuidian Rockies mapped witJi the 

 Paleozoic undi vided.El^ewhere com- 

 bined with the Jiuassic) 



TRIASSIC AND JURASSIC 



llxcil hcd s OKil iiiiirnn' ili'/ms/ts of 

 lite ( iinldlcrn,co/n/>risin(/ diuassic. 

 friassicaiKl I'l-rni ian :miirine 7 classic 

 anil darussic nf llir I'lici/ir wlirrr /n'/ 



SCplll illcil i 



'X^> 



22 



r 



11 



A ^ 



IGNEOUS ROCKS 



V^ 



