REGISTER OP PHOTOGRAPHS RECEIVED IN 1895. 499 



1184. Old andesite (porphyritic) tuffs west of the Salmon lakes, Sierra county, 



California ; showing joint structure. The tuffs are of Jura-Trias age. 



1185. Columnar lava of Jura-Trias age, about four miles north of the Sierra buttes. 



Sierra county, California. Downieville atlas sheet. The easterly dip of 

 the lava layer is approximately indicated by the upper surface of the 

 columns. 



1186. Hornblende-pyroxene-andesite breccia on the ridge top near Saddle Back 



mountain. Sierra county, California, showing the angular character of the 

 fragmental lava. 



1187. Abandoned hydraulic gold gravel mine at Scales, Sierra county, California. 



Downieville atlas sheet. 



1188. Lower Sardine lake and the Sierra buttes (Downieville atlas sheet), showing 



the sharp line between the glaciated rocks of the buttes and the moraine 

 material which begins where the line in red ink is drawn. 



1189. Exfoliating granite ; view on the crest of the Sierra Nevada about three miles 



south of Raymond peak, Markleeville atlas sheet. See 14th Annual Re- 

 port U. S. Geological Survey, page 481. 



1190. Wind ripples in the «and, near west entrance to Golden Gate park, San 



Francisco. 



1191. Wind ripples in the sand, near north entrance to Golden Gate park, San 



Francisco. 



1192. Cascades hydraulic gold gravel mine, showing the deposits of a Tertiary 



river, east slope of the Grizzly mountains, Plumas county, California. 

 Downieville atlas sheet. ' 



1193. Fault scarp and depressed block to the east of it, at the head of Dogwood 



creek, Plumas county, California. Bidwell Bar atlas sheet. 



1194. Poker Flat, Sierra county, California (Downieville atlas sheet), surrounded 



by volcanic mountains, chiefly of fragmental andesite. 



1195. Neocene shore gravels resting unconformably iii a water-worn surface of the 



lone sandstones, three miles southeasterly from Buena Vista, Amador 

 county, California. Jackson atlas sheet. 

 1] 96. Glaciated canyon of the head of West Walker river, Mono county, California. 

 Taken from the crest of the Sierra Nevada. 



1 197. Sawtooth peak from Mineral King, Tulare county, California. Elevation of 



Sawtooth about 13,000 feet. 



1198. Wind ripples in sand, by north entrance to Golden Gate park, San Fran- 



cisco. 



1199. lone formation capped by Pleistocene gravels ; south bank of Mokelumne 



river, just east of the Comanche bridge, Calaveras county, California. 

 Jackson atlas sheet. 



1200. Porphyritic granite, near Granite lakes, Tuolumne county, California. The 



larger potash feldspars are two inches long. 



1201 . Glaciated granite, about six miles north of Hetch-hetchy valley looking north, 



Tuolumne county, California. 



1202. Granite lake, Tuolumne county, California, showing the glaciated surfaces. 



1203. Silver peak composed of andesitic tuffs and lavas 3,700 or more feet thick in 



thickness, Alpine county.. Markleeville atlas sheet. 



1204. Glaciated knob of columnar hornblende andesite, three miles west of Silver 



peak, Alpine county, California. Markleeville atlas sheet. 



