240 



ILLUSTRATIONS. 



Figure 



9. Leg bones of a dinosaur, showing size in comparison with that of a 



man 53 



10. Map showing outline of the Great Basin 82 



11. Diagram showing fluctuations of water surface of Great Salt Lake, 



Utah, 1850-1914 95 



12. Diagram showing normal and reverse or overthrust faults 100 



13. Diagrammatic structure section of the Wasatch Range, in Ogden 



Canyon : 100 



14. Cross section of Marsh Creek valley at McCammon, Idaho 120 



15. The Three Tetons, looking east 142 



16. Diagrammatic cross section showing the geologic structure of the 



Virginia Range in its relation to Truckee Meadows 188 



17. Sketch maps showing capture of upper part of Bear River by 



South Fork of Yuba River (on sheet 23) '214 



18. Diagram showing the present relation of the Tertiary auriferous 



gravels to bedrock and lavas 208 



19. ilap showing geologic formations along the south shore of San 



Pablo Bay (on sheet 25) 224 



20. Section showing structure along the south shore of San Pablo Bay 



(on sheet 25) 224 



