THE ACE Or MAMMALS 



CENOZOIC. OR TERTIARY AND QUATERNARY 



WESTERN LAKE BASINS and CHARACTERISTIC MAMMALS 



THE TERTIARY FORMATIONS ARE REPHISENTID IN 

 • IS or Of I'OSITS 

 FORMED ON THE BOTT'iv 



* LR LAKES TMUW TnlAl 

 IS NEARLY 1SOOO FEET. REQlllWiNl. IMHIIIRU 

 TWO OR THREE MILLION YEARS TO FORM 



t UiMENtS OF THESI 



MAINS Or MANY 

 OF THE ANIMALS WHICH LIVED AMUUNO 



. AVINO THU-. - 

 01 TMI 



INMAH'TIL) 'HI lAhl HLI.IIIN 



I'l UIODS 



RECENTand 

 PLEISTOCENE 

 PLIOCENE 



MIOCENE 



OLIGOCENE 



I \KI U\S|\S 



EQUUS ahoMEGALONYX 

 BLANCO and PALO DURO 



LOUP 



DEEP RIVER 



JOHN DAY 



(OREGON. NEVADA 1 



HITE RIVER 



SOAK. Nl'AK fOL. CANADA 



•lH* ( ll\li\l II IIMII \IWI\l\ls 



ELEPHANTS LAST MA 1 ' 

 KST6R00ND '-• I ABM rSOTMIKCK 



CAMELS ONE TOED HORSES CAVE 8f ARS 



GROUM0S10TH5 CAMUS ONE Ku 



MASIODONS.TRUE HORNllSS RHINOCEROSES, 



I .It NOH'-t'.-.' 

 DEER FIRST PRONU HUHN AN' 



'-'" ii«r.i " 



HORNLESS and THIN HORNED RHINOCEROSES 

 LAST ELOTHERES. oreooonts 



PRIMITIVE CAMELS PRIMITIVE OEER 

 K00CNT8. OOCS. WOI . 



CATS SABRETOOTH TIGERS 



EOCENE 



BRIDGER 



WYOMi". 



WIND I 





■ in .- i 



1 



^ CRETACEOUS 



MYOPOTAMIOS.PROTOCERAS n 

 LAST CREOOONTS DOGSmCATS I 



ELOTHERES. cursorial rhinoceroses tapirs 



FIRST THREE TOCD HORSES MESOHIPPUS 



SWIMMING RHINOCEROSES -AMYNODONTS) 

 EAST TITANOTHERES oreodohts »..«a«t 

 FIRST TRUE HORNLESS RHINOCEROSES 

 ■ 



PRIMITIVE RHINOCEROSES , , AMYNODONTS 



TITANOTHERES ELOTHERES. creodonts 



ijatoooNis TAPIRS 



FOUR TOCO HORSES PRIMATES. RODENTS 



LAST UINTATHERES. oog 



UINTATHERES. 

 TITANOTHERES i>»l*09»o« teihaiothihuw 

 PRIMITIVE RHINOCEROSES HYRACHYUS 1 

 FIRST ELOTHERES ACH*N0O0N' 

 LARGE CREOOONTS MESONYX 

 C»HI«£ FtTRWI! 



W51 SELF.NOOONT ARTinf.J 

 FOUR T0F.0 MORSCS UFIOHIPPUSI 



LAST PRIMITIVE CROUNO SLOTHS 

 PNIMATCSNCOtNTS »AT» LAST TILLODONTS 



LAST CORYPHOOONS. FIRST UINTATHERES 



1UTHERES LAST CONOVLARTHS 

 I KOTONOHIPPUS' PRIMATES 

 ~U, BATS TILLOOONTS 



AMBLYPOOS CORYPHODDN 



CONOYLARTHS PHEMACODUSr 



-A..UTMIRIUM' 

 .aTEMOOONi 

 IPS! ARTIOOACTVLS - CLOVEN Mj 



CREOOONTS .PRIMITIVE CAF". 



PtSfMBLINO CATS. OOtV 

 FIRST ROOIMTS 

 TILLOOONTS "StCTIVORCS 

 PRIMITIVE CROUNO SLOTHS 



CRll 



vl I E SOOO 





DIVISIONS OF THE AGE OF MAMMALS 

 Characteristic fossil mammals, and the geological formationi in which they are found 



'3 



