442 N. H. DARTON CATALOG OF PHOTOGRAPHS 



1273. Devils tower; near view (No. 738). 



1274. Devils tower, west side; near view (No. 739). 



1275. Columnar structure of phonolite. Inyankara mountain, Crook county, 



Wyoming (No. 745). 



1276. Overturned tree, with roots lifting rock fragments. West side of Black hills, 



Weston county, Wyoming (No. 748). 



1277. Sundance mountain ; showing talus cones of trachyte, near Sundance, Wy- 



oming (No. 742). 



1278. Sink-hole in Minnekahta limestone east-northeast of Cambria, Wyoming 



(No. 593). 



1279. A typical tepee butte, Weston county, Wyoming, due to limestone lense 



filled with Lucina occidentalis, in Pierre shale (No. 587). 



1280. Concretions in Laramie sands, Weston county (No. 595). 



1281. Little Sundance dome east of Sundauce. Purple limestone and underlying 



beds uplifted by a laccolite (No. 585). 



Photographed by 1. C. Russell 

 <>2 by 82 inches. Negative in United States Geological Survey 



1282. Jurassic rocks, Como (Aurora), Wyoming (No. 294). 



Photographed by N. H. Barton 

 8 by 10 inches. Negative in United States Geological Survey 



1283. Minerva terrace, Mammoth Hot springs, Yellowstone park (No. 651). 



1284. Paint pots near Fountain hotel, Yellowstone park (No. 667). 



Photographed by C. D. Walcott 

 6j by 82 inches. Negatives in United States Geological Survey 

 Yellowstone Park views 



1285. Mouth of Fountain gej^ser shortly before eruption (No. 548). 



1286. Mouth of Fountain geyser shortly before eruption (No. 548«)- 



1287. Siliceous deposits in the basin of the Great Fountain geyser (No. 549). 



1288. Terrace pools on lower slopes of Angel terrace (No. 550). 



1289. Calcareous points covering bottom of pool, Angel terrace, Mammoth hot 



springs (No. 552). 



1290. Calcareous deposits in pool, summit of Angel terrace, Mammoth hot springs 



(No. 553). 

 1290a. Calcareous (mushroom-like) concretionary deposits, Angel terrace, Mam- 

 moth hot springs (No. 554). 



1291. Calcareous (mushroom-like) concretionary deposits, Angel terrace, Mam- 



moth hot springs (No. 554a). 



1292. Calcareous algae in outlet of pools, summit of Angel terrace, Mammoth hot 



springs (No. 555). 



1293. Angel terrace near Mammoth Hot Springs hotel (No. 515a). 



1294. View showing method of deposition of the siliceous deposits on slope of hot 



springs, summit of Angel terrace (No. 516). 



