452 N. H. DARTON — CATALOG OF PHOTOGRAPHS 



Cave Interiors 



565-571, 573-582. Mammoth cave, Kentucky. 

 572, 584, 585. Wyandotte cave, Kentucky. 

 586, 587. Marengo cave, Kentucky. 

 882, 883. Howes cave, New York. 

 1196-1207. Caverns of Luray, Virginia. 



Chert and Flint 



271. Chert in limestone west of Big Pine, Inyo county, California. 



346. Chert in sillery below Quebec, Canada. 



554. Niagara limestone, Lyons, Iowa. 

 1137. Koontz series, Texas. 

 1146. Flint nodules in chalk, south bank of Colorado, Texas. 



Columnar Structure 



280. Laminated and roughly columnar fine-grained pyroxene-andesite, Franklin 



Hill, California. 

 300. Glaciated andesite, Alpine county, California, 



393. Granite in canyon of Animas river, opposite Ten-mile creek, Colorado. 

 461. Hawaii. 

 721. Basaltic columns and bedded trap in gorge of Passaic river at Paterson, New 



Jersey. 



724. Falls of the Passaic, Paterson, New Jersey. 



725. Palisades of the Hudson, north from Englewood cliffs. . 

 726-731. Columnar basalt, O'Rourke's quarry, near Orange, New Jersey. 

 732. Basalt, showing columns of cooling, near Orange, New Jersey. 



1271-1274, 1359. Devils tower, Wyoming. 



1275. Columnar structure of phonolite, Inyankara, Wyoming. 



1300, 1301. Obsidian columns, Obsidian cliff, Yellowstone park, Wyoming. 



1323. Basalt cliff near Tower falls, Yellowstone park, Wyoming. 



Conglomerates (near views only) 



191. Igneous pudding stone north of Yosemite valley, California. 



349. Conglomerate in Sillery beds below Quebec, Canada. 



445. Andesite conglomerate, head of Rio Grande, Colorado. 



657. Laramie conglomerate, Montana. 



680. Arikaree beds southeast of Gering, Nebraska. 



813, 814. Boulders in Algonkian, Washington county, New York. 



826, 827. Potsdam conglomerate, Saratoga county, New York. 

 1148. Carboniferous and Permian, Hurricane cliff, Utah. 

 1157. Calciferous conglomerate near High Gate falls, Vermont. 



Concretions 



599. In Matawan formation, Magothy river, Maryland. 



601. Ferruginous concretions in Potomac formation, Baltimore, Maryland. 



