498 PKOCEEDINGS OF PHILADELPHIA MEETING. 



1167 (148). Oneota river bluffs of dolomitized Devonian limestone. Foreston, 



Howard county, Iowa. Photographed by Calvin. 



1168 (149). The Buchanan gravels, an interglacial, probably Aftonian deposit of 



water-laid, cross-bedded sands and -gravels. The boulders in fore- 

 ground have been thrown out of the gravel, and are of the Kansan 

 drift type. The gravels are overlain by a thin layer of lowan drift 

 with numerous large granite boulders (see number 151). Photo- 

 graphed by Calvin. 



1169 (150). Granitic boulders of lowan drift near Winthrop, Iowa. Photographed 



by Calvin. 



1170 (151). Boulders of lowan drift overlying interglacial deposits, the Buchanan 



gravels, near Independence, Iowa. Photographed by Calvin. 



1171 (152). Granite boulder of lowan drift. Section 16, Newton township, Buch- 



anan county, Iowa. Photographed by Calvin. 



1172 (153). Boulders in lowan drift. Buchanan county, low'a. Photographed by 



Calvin. 



Forty views presented by the U. S. Geological Survey {11. W. Turner). 



1173. Laminated and roughly columnar finegrained pyroxene-andesite. Franklin 



Hill (I>idwall Bar atlas siieet), California. See Journal of Geology, vol- 

 ume iii, 1895, page 410. (Specimens, numbers 209, 661, etcetera.) 



1174. Moraines two miles northeast of the Sierra buttes (Downieville atlas sheet). 



It will be noted that the longer moraine lies directly across an earlier 

 moraine. 



1175. Potholes in the granite of the canyon of tlie north fork of the Mokelumne 



river, California. See American Journal of Science, volume xliv, page 

 453. 



1176. Canyon of the north folk of the Mokelumne river, near its head, southeast 



corner of the Pyramid Peak atlas sheet. This portion of the canyon is 

 glaciated. 



1177. Farewell gap, at the head of the drainage of a branch of the middle fork of 



the Kaweah river, Tulare county, California. In the southern Sierra 

 Nevada. Elevation of tlie gap about 10,500 feet, 



1178. The shattered granite crest of the Sierra Nevada, about six miles southeast 



of Tower peak, in Tuolumne county, California. 



1179. Glaciated canyon north of lake Eleanor, Tuolumne county, California, show- 



ing the roches moutonnee. All the rock is granite. 



1180. Granite bank west of Granite lake, Tuolumne county, California, showing 



basic nodules in the granite and dikes of aplitic granite (granulite of Levy) 

 cutting both the main granite mass and the included nodules. See 14th 

 Annual Report U. S. Geological Survey, page 480. 



1181. View in Hetch-hetchy valley on the Tuolumne river, Tuolumne county, Cali- 



fornia. Yosemite atlas sheet. The rock composing the ])luff is granite. 



1182. Basic (black hornblende and some feldspar) inclusions in porphyrite (altered 



andesite) dike by the middle fork of the Feather river. Sierraville atlas 

 sheet. 



1183. Basaltic dikes in andesitic breccia on ridge south of Poker flat, Sierra county, 



California. Downieville atlas sheet. 



