CONTENTS. 



CHAPTER I. 



THREE GEOLOGICAL PROVINCES. 



Page. 



Geographic characteristics of the three provinces ............................................... 7 



General characteristics of the sedimentary groups ................... , .......................... 8 



Characteristics of orogr aphic structure ....................................................... 9 



Types of orographic structure ............................................................. 9 



Orographic structure of the Basin Province ..... ......................................... 23 



Orographic structure of the Plateau Province .............................................. 25 



Orographic structure of the Park Province ................................................ 26 



History of the three provinces during Ceuozoic time ........................................ 32 



CHAPTER II. 



SEDIMENTARY GROUPS OF THE PLATEAU PROVINCE. 



Table of the groups of sedimentary strata ...................................................... 40 



Localities where the several groups can be studied ......................................... 45 



Section of White Cliff, Vermilion Cliff, and Shinarump groups ........................... ... 53 



Uinta Mountain section ................................................................... 57 



Cataract Gallon section ................................................................... 58 



Grand Cafion section ..................................................................... 60 



Epochs separating the groups ............................................................. 62 



Liguitic coal .............. ......................... . ..................................... 73 



CHAPTER III. 



INVERTEBRATE PALEONTOLOGY OF THE PLATEAU PROVINCE. 



Letter of transmittal .................. "By C. A. White, M. D." ................... J ........... ?4 



General observations ......................................................................... 75 



Lower Silurian Age ....................................................................... 79 



Upper Silurian and Devonian Ages ........................................................ 79 



Carboniferous Age ........................................................................ 79 



Mesozoic Age ............................................................................. 80 



Cenozoic Age ................................................................... . ......... 84 



Catalogue of fossils ............... . ............ . ..... . ......... . ............ .. _____ . ____ ...... 88 



Carboniferous Age ........................................................................ 88 



I 



