THE AGE OF REPTILES 





(M E S O 2 O 1 



c) 



GEOLOGICAL FORMATIONS and CHARACTERISTIC ANIMALS. 



THE AOE OF REPTILES 



PRECEDED THE AGE DURING 



THIS AGE THE REPTILES APPEARED. 



OF MAMMALS. AND IE 



REPRESENTED IN FLOURISHED GREATLY. AND DECLINED AT 



VARIOUS PARTS OF THE 



WORLD BY MARINE. ITS CLOSE TO THEIR PRESENT IMPORTANCE 



ESTUARV AND FRESH-WATER DEPOSITS 1 THE MAMMALS APPEARED WELL DOWN IN 



DIVIDED INTO THREE GREAT PERIODS, 1 THIS AGE BUT REMAINED SMALL AND 





rRIASSIC, JURASSIC 



AND CRETACEOUS. | SCARCE UNTIL ITS END 







' PERIODS 



FORMATIONS 



!,;;; 



( DARACTKRLSTH .NIMAI.S 





y,| EOCENE 



h R i'EJ'O'N 





MAMMALS IN URGE NUMBERS 











TRUE LIZARDS ind SPHENOOONS 







PUER CO 



BOO 



ALLIGATORS and CROCODILES 

 TURTLES 















CARNIVOROUS DINOSAURS 

 HERBIVOROUS DINOSAURS 

 HORNED HERBIVOROUS DINOSAURS 











1009 









L A R A M 1 E 



soon 



NUMEROUS SMALL MAMMALS 











LAST PLESIOSAURS 



FIRST SOFT SHELLED TURTLES 

















MODERN TARED AMPHIBIANS SA1 AWARDERS 







10 * 







BIRDS. PROBABLY TOOTHED 











PTERODACTYLS TOOTHLESS 







MONTA NA " 



1200 



K700 



MOSASAURS and PLESIOSAURS 

 GIGANTIC MARINE TURTLES 











DOLICHDSAURtAN LIZARDS 











SHANKS CATFISH STURCtONSAIWIiHU PIKES 







^ a. 



' 





TOOTHED BIRDS TOOTHIE^S PTERO0ACTYLS 











DINOSAURS 







s 



COLORADO 



1000 



MOSASAURS ^PLESIOSAURS 









300U 



LARGE MARINE TURTLES 







(^ CRETACEOUS 









BONY FISHES teleosts SHARKS 

 OANOIO FISHES 







<t 





DA KOTA 



400 









kj 







sooo 



TURTLES 













TRUE LIZARDS.] <! OflUCHOSAIJRS 







* 



fit 

 N 







HERBIVOROUS DINOSAURS(,m«ooo.Ta 













CARNIVOROUS 0IN0SAURS mccalosaum 







\ 





300 

 2600 



PTERODACTYLS. TOOTHEOaXlOOTHLESS 









- 



COMANCHE 



MOSASAURS 









-v 







SCHTHYOSAURSarK PLESIOSAURS 









^ 



WEALD E N 





CROCODILES. TURTLES. 









\ 



POTOMAC 





SHARKS and GANOID FISHES 







I. ___ 









CHIM/CROID FISHES 





*< 



< 







PB.Yitiv MtMMAtS MASSWAIS INSlCllrtHtS 



i«a MULTITUBLKCUtATESl 





(S 



5 







CARNIVOROUS DINOSAURS TERAT0SAURUS' 







Q 







HERBIVOROUS DINOSAURS ATIAHTOSAURUS 











TURTLES PTERODACTYLS 







JURASSIC j 





1500 

 4000 



FIRST BIROS WITH TEETH SAUHUH* 









ICHTHYOSAURS TOOTHED .irtTOOIHltSS 







* 





PLESIOSAURS PURODACTYlS TOOTHED 1 







, 







SMALL PRIMITIVE MAMMALS 







N 







CRQCURIE5 (TEUOSAURS] 











ICHTHYOSAURS and PLESIOSAURS 







SL 







FIRST HERBIVOROUS DINOSAURS 









TURTLES PTEROOACTYLS 









IshaRKS »»0 CHONOROSTEAN FISHES 





t5 1 







REPTILE MAMMALS ''oPOMATHtTRIUM. 







TRITYLOOON, MICROLESTtS 



RICHMOND COAL-BEDS 



FIRST CARNIVOROUS DINOSAURS 





and CONN, and NEW JERSEY 





LAST LABYRINTH00ONTS 







^ 







PRIMITIVE CROCODILES ■BlLGUON 







N TRIASSIC ,- 







FIRST TURTLES ind PTERODACTYLS 









3000 



6000 



FIRST TtLEOST on BONY FISHfS 









SHARKS.CMnHDNOSTtA.i.1 LUHG FISHES 



PLESIOSAURS [NOTHOSAURS 







| 







FIRST ICHTHV0SAURS(MIXOSAURUS; 







^ 







PLACOOONTS 







i 







LARGE AMPHIBIANS LABY 







5 







RINTHODONTS 







5 







FIRST PLESIOSAURS NOTHOSAURS, 











FIRST REPTILES COTUOSAURS. 









PR0GAHOSAURSi«iPELYCOSAURS 







§3 PERMIAN 

 . t> 





£00 

 !CO0 



PRIMITIVE AMPHIBIANS 5IE60CEPHIEIA 







■ 1 ■ 





SHARKS LUNG FISHES 







mm 





CMO«C»OSTEAN i»a CBOSSOI- • 





k,* CARBONIFEROUS 







PRIMITIVE AMPHIBIANS STEGO 



CEPMAUA. M«n> 5«a.„ spir es 



PRiMlTlYE SHARKS JM LUNG FISHES 



< c*ossoPTt>rretA<i ris*is 

















