-THE AGE DF REPTILES 



|M E s a Z O I C I 



GEOLOGICAL FORMATIONS and CHARACTERISTIC ANIMALS. 



TNI AGC or REPTILES PRECEDED THE AOE OURING THIS ACE THE REPTILES APPIARCa 



or MAMMALS. AND IB REPRESENTED IN fLOURISHED GREATLY AND OCCLINED AT 



VARIOUS PARTS or THE WORLD BV MARINE. ITS CLOSE TO TMEIR PRE3ENT IMPORTANCE 



CSTUARV AND fRESM WATER DEPOSITS I THE MAMMALS APPEARED WELL DOWN (H 



DIVIDED INTO THREE GREAT PERIODS, ' THIS AGE BUT REMAINED SMALL AND 



TRIA531C, JURASSIC AND CRETACEOUS SCARCE UNTIL ITS END 



' l*KHl()V)S 



l-'HUMAl KINS 



IIIMfU iriMSIIi \M\l\ls 



i*j| EOCENE 



TORReJON 

 PUERCO 



MAMMALS IN L*RG£ NUMBtB_S 

 TRUE LIZARDS >n4 5PHENOD0NS 

 ALLIGATORS ind CROCODILES 

 TURTLES 



Is CRETACEOUS 



L A F^ A M I E 



MONTA N A 



CO LORAD O 



COMANCHE 



WEA1.D EN 



POTOMAC 



CARNIVOROUS DINOSAURS 

 HERBIVOROUS DINOSAURS 



HORKED HEfieiVOfiOUS 0IN05AURS 



MOSASAUHS and PLESI05AUHS 



GIGANTIC MARINE TURTLES 



OOLICHD^AUHIAN LIZARDS 



TO0IHID1II.0S loormis* PiiftoMirnt^ 



DINOSAURS 



MO5ASAURSWPLE5I05AURS 



LARGE MARINE TURTLES 

 eoHv FISHES TELiosTs SHARKS 



GANOID riSHCS 



TURTLES 



TRUE llIAROSixDOUCKOSAURS 



HERBIVOROUS DmOSAURS.>iuuo«»i.. 

 tiilNiyOROUS DINOSAURS ucuio^.uin 



PTtSODACTVLS TOOIMtOirflOOIKUSS 



M05A5AURS 



ICHTIIY0SAUR5.i»i PLESIOSAURS 

 CROCODILES TURTLES. 

 SHARKS ]»i9 GANOID FISHES 

 CHIMiCROlO riSHCS 



CARNIVOROUS DIKQSIiURS CERA1DSAUHUS' 

 HERBIVOROUS OIHOSAURS ;ATIA1II0SUIRUS' 



IHTLES PIEfiaOACTVLB 



ICHTHYOSAUflS TODTHEDjmTOIHIESS 



PLtf^POSAIJRS PlEMMCTnS'TOOTMtO 

 f:ji=.,l HH<MniN,_L "•MJ-.*i5 



IQNG NOSED CNDCOOHES 1EIE0&AUHSI 

 lCHIHir05AURS jnd P1ESI0SAU89 

 FIRST HERBIVOROUS DINOSAURS 



TURTLES PTEBOOACTYLB 



TRIASSIC ., 



FIRST CARNIVOROUS DINOSAURS 

 LAST LftBYfilNTHOCONTS 

 PRIMITIVE CROCODILES.eUODON 



FIRST TURTLES ...1 PTfHDtiALIUS 



PLESIOSAURS iNOTHOSAURS 



FIRST ICHTHYObAUHSlMIXOSAURUS 



LARGE AMPHIBIANS LABY 



RINTHDOONTS 



FIRST PLESIOSAURS NOIWObAUBS,' 



FIRST REPTILES COIVIOSAURS 



PR0GAHOSAURS..-.tPELVC0SAURS 

 PRIMITIVl AMPHIftlAHS SIEGOCEPHIUA 



SHARKS UUMC FISMEB 



PRIMITIVE AMPHIBIANS ifTCCO' 

 ctPHAUA. mm' tuMt i*u<>: 

 PDlHinn SKMKSiMLUNG ti%t*ll 



DIVISIONS OF THE AGE OF REPTILES 

 Characteristic fossil reptiles, :uiiphibi;ins ;inJ fistu-s, nnd the formations in vv'hich they arc found 



30 



