CONTENTS 



PAGE 



Abstract 91 



Introduction 91 



Previous work 92 



Present environment 92 



Acknowledgments 95 



Geology 95 



Stratigraphy 95 



Basement rocks 95 



Alta andesite 96 



Kate Peak andesite 97 



Coal Valley formation 97 



Post-Coal Valley rocks 105 



Structure 105 



Summary 106 



Composition of the Flora 107 



Paleoecology Ill 



Summary 117 



Age 118 



Stratigraphic evidence 118 



Paleontologic evidence 118 



Plants 118 



Mammals 125 



Systematic Descriptions 125 



Literature Cited 134 



Map 

 1. Geology of a part of the Verdi basin (pocket) 



Figures 



1. Geographic occurrence of the Verdi and other Tertiary floras 



in the nearby region iv 



2. Generalized stratigraphic diagram of the Verdi basin 94 



Tables 



1. Quantitative representation of species in the Verdi flora 108 



2. Relationships of Verdi species to living plants 109 



3. Floristic composition of the Verdi flora 110 



4. Distribution of living woody plants related to Verdi species Ill 



5. Comparative climatic data for Verdi area and for regions 



where the Verdi flora finds most of its modern relatives 114 



6. Distribution of Verdi species in other Tertiary floras 120 



7. Cliseral, geographic, and climatic relations of Tertiary vegeta- 

 tion in western Nevada 122 



