THE MIDDLE PALEOZOIC STRATIGRAPHY OF THE 

 CENTRAL ROCKY MOUNTAIN REGION 1 



C. W. TOMLINSON 



University of Chicago 



CONTENTS 



PART I 



Foreword 



Locations of sections 

 Stratigraphy 



The Correlation Diagrams 



Use of the Diagrams 



Method of Correlation 



Source of Data 

 Standard List of Members 



Mississippian 



Devonian 



Silurian 



Middle and Upper Ordovician 



Upper Cambrian and Early Ordovician 

 Paleontological Collections: Assembled Lists 

 Disconformities 



PART II 

 Stratigraphy — Continued 



Upper Cambrian and Early Ordovician 



Members o and i 



Members 3 and 4 in Northern Utah 



Correlation with the Pogonip Group of Nevada 



Member 3 in Wyoming and Montana 



The Maxfield Formation of the Central Wasatch 



The Close Relation of the Canadian Series to the Upper Cambrian 

 Series 



Is the Ozarkian System Represented Here ? 

 The Ordovician Quartzites and Sandstones 



The Eureka and Swan Peak Quartzites 



The "Ogden Quartzite" in the Uinta Range 



The Sandstone at the Base of the Bighorn Formation 



1 An abridgment of a thesis presented for the degree of Doctor of Philosophy at 

 the University of Chicago, 1916. 



