CONTENTS. xi 



Chapter VI. — Economic, geology, by George II. Eldridge — Continued Page. 

 Section IV. — Artesian wells — Continued. 

 II j drography — Continued. 



Absorbing power of si rata 419 



Tower of 1 ransmissiiin in water-bearing strata 420 



The capacity of the strata, their yield, and the rainfall, considered relatively 421 



Wells 122 



Denver and suburbs 122 



Range of flows in stratigraphic horizon 122 



Relative productive power of the several water-bearing zones. 425 



5Tield of the wells 125 



Life of the wells 128 



Causes of decrease in Hows Il'ii 



Well data of Denver and suburbs 130 



Other well records II* 



Chemical analyses 161 



Wells in the country 164 



Chapter VII. — Paleontology 166 



Section I. — The fossil plants of the Denver Basin, by F. II. Knowlton 466 



Historieal summary of \\ oris on the fossil plants of the 1 lenver Basin 4»>t> 



List of localities in the Denver Basin at which fossil plants have been obtained 1(!8 



Horizons Indioated by fossil flora 469 



Dakota group 169 



Laramie and Denver 171 



Section II. — Vertebrate fossils, b\ O. C. Marsh IT:; 



Introduction IT:! 



Pari I. i leological horizons IT."> 



Jurassic 175 



1 1 a 1 lupus beds IT."' 



Baptanodon beds 175 



Atlantosaurus beds ITii 



Cretaceous I Tii 



Pteranodon beds 4Tii 



Ceratops beds 477 



Tertiary 179 



Brontotherinm beds 179 



Pliohippus beds 180 



Part II. Jurassic vertebrate fossils 480 



Kept ilia 481 



Hallopus 181 



Nanosaurus - I*:! 



Baptanodon 185 



Atlantosaurus 185 



Apatosaurus 189 



Brontosaurus 192 



Restoration of Brontosaurus 194 



Diplodoeus 404 



