414 N. H. DARTON — CATALOG OF PHOTOGRAPHS 



714. Group of cones formed by the unequal erosion of rhyolite-tuff in the foot- 



hills of the Palmetto mountains- south of Clayton valley (No. 76). 



715. Lacustral marls of the Esmeralda formation at the east base of the Silver 



Peak range south of the Emigrant road (No. 71). 



716. Fault surface in the foothills of the Silver Peak range southwest of Clayton 



valley. The rock is rhyolite-tuff (No. 73). 



New Hampshire 

 Photographed by George P. Merrill, United States National Museum, Washington, D. C. 



6J by 8J inches 



717. Churchill rock, Nottingham, New Hampshire. Glacial drift boulder, 62 feet 



long, 40 feet wide, and 40 feet high ; source, local ; view from southwest. 



718. The Washington boulder. A glacial-drift boulder at Conway, New Hamp- 



shire. This is a very solid block of Conway granite. It cannot be shown 

 to have been transported more than one mile. Its dimensions are 30 by 

 40 by 25 feet. View from the northeast. 



719. The Bartlett boulder. A glacial-drift boulder at Bartlett, New Hampshire. 



This boulder is of the Conway granite, and rests on four smaller boulders 

 of the same kind on the summit of a knoll of till projecting through the 

 modified till. 



720. Cathedral rock. Profile view from the northeast. North Conway, New 



Hampshire. The hills show the typical roche moutonnee outline. 



New Jersey. 



Photographed by N. H. Darton 



5 by 8 inches. Negatives in United States Geological Survey 



Published in Bulletin 67, United States Geological Survey 



721. Base of first Watchung trap-sheet in gorge of Passaic river at Paterson, New 



Jersey, showing both basaltic columns and bedded trap in the same sheet 

 and contact with Newark shales (No. 22). 



722. Lateral ascent of base of palisade trap across Newark shales at Kings point, 



Weehawken, New Jersey. Shore of the Hudson river (No. 16). 



723. Cross-section exposure of base of palisade trap-sheet, showing its contact 



with the Newark shales. West Shore railroad tunnel, Weehawken, New 

 Jersey (No. 13). 



724. Falls of the Passaic at Paterson, New Jersey. Edge of first Watchung trap- 



sheet (No. 19). 



Photographed by S. P. Stoddard, Glens Falls, New York 

 5 by 8 inches. Price, 50 cents 



725. Palisades of the Hudson; looking northward from Englewood cliffs. 



