THE AGE or MAMMALS 



CEN020IC OR TERTIAHV AND QUATERNARY 



WESTERN LAKE BASINS and CHARACTERISTIC MAMMALS' 



TXC TIRTIARY (OfTHAIIONS AKt RlPfllSENTtO ••■ 

 WISTtRN AHIHICA 8V A btNICS Or DEPOSITS 

 rOHMCO ON TH£ BOTTOMS Of SUCCESSIVC 

 FRESH WATLR l«KtS THE IN TOTAL IMiChNESK 

 IS NEARIV IZUOO nil REOUtRINL I'MOSABLV 

 TWO OR TMRCf MILLlOM VfAHK TO ruRM 



IN THE StOlMKNtS or THCSt t*«*tB 

 wcnc euRltO TMC RCMAtNS OF MANV 

 or THE ANIMALS WHICH LIVED ANOUMD 

 THEIR SHORES LEAVING THUS A UCCDRO 

 0» THE SliCCCSBIVt QPECIf S WHICH 

 ■ NHAUiTEO THC LAME nCClON 



RECENT..0 

 PUISTOCENE 

 PLIOCENE 



MIOCENE 



GLIGOCENE 



i.\m: iiasins 



hii 



E0UU5 <w MECALONYX 



BLANCO aNO PALO DURO 



LOUP FORK 

 DEEP RIVER 



JOHN DAY 



(ORFGOH. NEV«CjA 



WHITE RIVER 



'NEV- SOAK, mUM.COLXAHAD^' 



( IIMivi II infill M\MM\LS I 

 ELFPMAMTS \A^T MA^OnONS ' 



400 ; I. 



ISO L™'' ".: 



^ ANTdOPfS 



EOCENE 



BRIDGER 



(WVOMtNG. UTAH j 



WIND RIVER 



w V o M 1 s r. * 



Wmia uo Twin HOMl miWCEtlECS 

 LAST ELOTHERIS ORIOOOHtS 

 fAIHITIVI UAUCIS PNlMITiVC OtCR 



CRITACEOUS 



PUERCO 



L -V « A tJ I E 



PtJIMIIIVE HHIN' . ■■1} 



riTAHOTHERtj ___ jmts 



Coalll It-:,' >ii. -_•■'. TAPIRS 

 Toto Hosats ^•Hsrts flCDiNT* 

 LAST UmUTKUES mx u.t otmrn mw* 



UINTATHERES. 

 TITAHOTHERES .huamim^ niMtoTmnM 

 ntiyiTivE ttniNOCCHOSfS HVRACHYUSt 

 riBST ELOTHtRES ACHANOnONl 

 LARGE CREO0ONT9 HCSONVX 



tit lilt MtHiL&MtMuu miasaaaem 



MtXJICOOal UmoUCtTL* HCtUCOE 

 1010 OOHtlt [OAOHII<FUtll 



LAST PRIHITIVC CROUNO SLOTHS 

 iMATUaootaTS Mil LAST T1LLO0ONTS 



lAST CORYPHOOONS. FIRST UIHIATHERES 



FIHST TITANOIHERES 1>ST LOMOVLARTHS 



■U* lUlO >.U«>Vt*,MOtO»(H"l»l'(Jl. PHIMAIt 



■ rSKiM'Ti aotiiais. (UTB. TillOOONIS 



AMBLYPODS CORYPHOOON 



COMOVLARTHS iPMCNACODUSi 

 n«(T toua Totu p<aitnf»'>nAACoiHtniuM' 



»T TAPinit OaKHOOOHl 



SI MT<oMCT<iLA>iCiom>Hai)ni>»iM<i.5 



MATtB |HO«i«tV« ■- L«l«U»»i 

 CRlOOOMTS^WtmllTIVl CAHtKVOtttS 

 Ri&CMaUMO CATS. OOCS".BtA«S' 

 BT HOOCHTS 



lOdomts iNBCCTivoRca 

 IMlTlve GROUND SLOTHE 



DIVISIONS OF THE AGE OF MAMMALS 

 Characteristic fossil mammals, and the geological form.iiions m which they are found 



>3 



