474 



GEOLOGY OF THE DENVER BASIN. 



The object of the present chapter is to indicate, first, the relative 

 position of these various horizons taken as a series and their characteristic 

 faunas; second, as still more instructive in the present connection, to give 

 accurate figures of important type specimens of the animals that lived 

 during these various periods, so that the strata containing their remains 

 may be thus identified; and, in conclusion, to state briefly something of the 

 lite history of these extinct animals, and under what conditions they lived 

 and died. 



To make this succession of strata clear to the reader, the geological 

 section represented in fig. *23 lias been prepared by the writer. It is a gen- 

 eral section designed to illustrate the vertebrate life of the Mesozoic and 



Recent. 



Quaternary. 



Tapir, Peccary, Bison. 



lias, Kyi/us, 'Japirtts, Dicotyles, Megatherium, Mylodon. 



Equus Beds. 

 Pliohippua Beds. 



Equus, Tapirus, Elephas. 



j Pliohipptts, Tapiravus, Mastodon, Procamelus, 



J Aceratherium, Bos, Morotherium, Platygonus 



Miohippus Beds. 

 Oreodon Beds. 

 Brontotherinru Bed; 



Miohippus, JHceratherium, Thinohyus, Protoceras. 

 \Oreodon, Eporeodon, Hycmodon, Moropus, Ictops, 



I II>irac<ulon,A<ji-lucl<<rntii, < 'idndrnt. L>p(<irlnr> !■*. 



^Brontotherium, Biontupr, AU<>p\, Titattops, Titans 

 i tht Hum, Mesohippus, Ancodus, Eatelodon. 



Diplacodon Beds. 

 Dinoceras Beds. 

 Heliobatis Beds. 

 i '■■[-}. phodon Beds. 



Itijdttctxluii. Epihippvs, A m>/itf<l"n, Eomcnjx. 

 \Dinoceras, Vinoceras, ' intatherium, J 'alceosyops, 



• Orolii/'pux, II >t rach yiis, Cidoiwceras, Ih>ini.tC'«h>n . 

 Ih'liobatis, Amia. Lepi<laxti-ux, Axint'ops, Clupca. 

 iGoryphodon, Eohippus, Eohyus, Syracops, Pardhyus. 

 /Lemurs, Cumulate*, '1 i Undents, Bodents, Serpents. 



Ceratops Beds. 

 Montana Group. 



( '< r atop s, Trieeratops, Olaosaurus, Ornithomimus. 



Mammals, Cimolom '/'■', Dipriodon, Sel> mo < id ,,,»-, 

 Nanoimyops, st anodon. Birds, Cimolopteryx. 



Pteranodon Beds. 



I'.irds with Teelli. Hi-apt n>rnis\ Irhthyonnx, I !■<<(<•, 

 Musasaurs. Edestnsaurim, Lextosaurus; Tylosuunis 

 Pterodactyls, Pterano don. Plesiosanrs, Turtles. 



itlantosaurnsBeds 

 Baptanodon Beds. 

 Ballopus Beds. 



; Dinosaurs, Brontosaurue, Morosaurus, JHplodoeus, 

 Stegosaurus, Camptosaurus, Oeratosaurus. Mam- 



I mala., DryoleMt'S, stylarodon, Tinodon, Ctenacodon. 



Otozouin, or 

 Conn. River, Beds. 



i'irst Ma in nials, I)r<uniitlicritiin. First Dinosaurs, 

 Anehisaurus, Arnmostiurus, Bathygmitluia, i'lrpsy- 

 saurus. Many footprints. Crocodiles, Belodon. 



Ki-slies, Cut.t/dents, hvfiy />(.,: run, Ptycholepis. 



-Seriii.n to illustrate horizons of vertebrate fossils. 



Cenozoic, as developed in the Rocky Mountain region, and includes every- 

 thing above the Paleozoic, although all the subdivisions are not indicated. 

 In addition to showing the principal horizons from the Triassic to Recent 

 deposits, it gives under each formation the genera of the most characteristic 

 vertebrate fossils found in each. 



