168 AN AMERICAN GEOLOGICAL RAILWAY GUIDE. (NET. & UTAH.) 



19. From Wells there is a fine view of the East Humboldt Eangc. Mount Bonpiand attains an 

 elevation of 11,321 feet above sea-level. 



20. Just east of Osino the railroad passes through Osino Canon, exposing a good section in 

 the Weber Quartzite. 



21. In the neighborhood of Elko may be seen the Green River Eocene, Humboldt Pliocene, 

 characteristic outbursts of rhyolite and the " Chicken Soup" hot springs. 



22. In Moleen Canon the Carboniferous formations are well shown. 



23. Palisade Canon cuts through rhy elites ; there are also exposed andesites and trachytes. 



24. Mill Cit^r is the most convenient place to leave the railroad in order to study the character- 

 istic Triassic formations of the West Humboldt Range. 



25. From Humboldt there is a fine view of the West Humboldt Range. In the neighborhood 

 are some interesting outbursts of basalt and a deposit of sulphur. 



26. In the Montezuma Range, west of Brown's station, the volcanic rocks are well shown. It 

 is an interesting place to study rhyolites and basalts. 



27. The Hot Springs, a short distance east of the station, reach the surface near the base of 

 basaltic hills. 



28. The Truckee Canon, just east of Wadsworth, offers remarkable outbursts of a great variety 

 of volcanic rocks. There may be seen here basalts, rhyolites, trachytes, andesites and propylites. 



29. Propylite is the characteristic volcanic rock, which carries the Comstock Lode. A. H. 



30. The last rail completing the Pacific railroads, from Omaha to San Francisco, was laid May 

 10th, 1869. 



See notes on page 165. 



