110 
INDEX TO NORTH AMERICAN GEOLOGY, 
[BULL. 203. 
Dynamic geology — Continued. 
Erosion— Continued. 
Broad valleys of the Cordilleras, Shaler, 692. 
Concretions of Ottawa County, Bell, 59. 
Drainage features of California, Lawson, 483. 
Eboulement a Saint-Luc-de-Vincennes, La- 
flamme, 460. 
Geological history of Charles River, Mass., 
Clapp, 139. 
Geology of Salinas Valley, Nutter, 570. 
Grand Canyon of the Colorado, Davis, 202. 
Modifications remarquables causees a l'em- 
bouchure de la Riviere Ste.-Anne, La- 
flamme, 459. 
Newark system of the Pomperaug Valley, 
Hobbs, 376. 
Origin and structure of the Basin ranges, 
Spurr, 723. 
Peneplains of central France, Davis, 203. 
Peneplains of the Ozark highland, Hershey, 
361. 
Preglacial drainage in southwestern Ohio, 
Miller, 547. 
River action phenomena, Tood, 741. 
River beds and bluffs, Heiney, 360. 
Faulting. 
Fault slip in Ogden Canyon, Talmage, 737. 
Geology and vein phenomena of Arizona, 
Comstock, 161, 
Grand Canyon of the Colorado, Davis, 202. 
Miniature overthrust fault and anticline, 
Purdue, 634. 
Newark system of the Pomperaug Valley, 
Hobbs, 376. 
Origin and structure of the Basin ranges, 
Spurr. 723. 
Paleozoic limestones of Kittatinny Valley, 
Kiimmel and Weller, 457. 
River system of Connecticut. Hobbs, 377. 
Folding. 
Miniature overthrust fault and anticline, 
Purdue, 634. 
Oil of the northern Rocky Mountains, Willis, 
834. 
Origin and structure of the basin ranges, 
Spurr, 723. 
Paleozoic limestones of Kittatinny Valley, 
Kiimmel and Weller, 457. 
Intrusion. 
Laccoliths of the Black Hills, Jaggar, 402. 
Jointing. 
River system of Connecticut, Hobbs, 377. 
Oscillation. 
Broad valleys of the Cordilleras, Shaler, 692. 
Evidence of local subsidence, Campbell, 103. 
Geomorphogeny of Klamath Mountains, Dil- 
ler, 230. 
Oscillations in the sea level, Pearson, 589. 
Sedimentation. 
Beach structure in Medina sandstone, Fair- 
child, 265. 
Depositional measure of unconformity, Keyes, 
422. 
Micaceous cross-banding, of strata, Wood- 
worth, 857. 
Volcanoes. 
Cripple Creek volcano, Rickard, 467. 
Economic geology. 
Alabama. 
Alabama coal fields, McCalley, 511. 
Marble formations of the Cahaba River, Byrne, 
99. 
Alaska. 
Gold mining in Alaska, Furman, 289. 
Nome gold region, Schrader and Brooks, 681. 
Notes on Nome, Rickard, 646. 
Occurrence of cassiterite, Brooks, 80. 
Occurrence of stream tin, Brooks, 80a. 
Arizona. 
Geology and vein phenomena of Arizona, 
Comstock, 161. 
Arkansas. » 
Arkansas beauxite deposits, Hayes, 356. 
Zinc-lead deposits of southwest Arkansas, 
Phillips, 610. 
California. 
California type of auriferous deposit, Hershey, 
367. 
Geology of Salinas Valley, Nutter, 570. 
Occurrence of platinum, Day, 226. 
Oil fields of California, Lakes, 470. 
Origin and occurrence of petroleum, Cooper, 
163. 
Petroleum in California, Claypole, 149. 
Remarkable salt deposit, Holder, 383. 
Canada. 
Auriferous deposits of Vancouver Island, 
Watson, 792. 
Coal Creek colliery of Crows Nest Pass, Cor- 
less, 164. 
Geology of the Three Rivers map sheet, Ells, 
256. 
Gold-bearing alluvions of Quebec, Chalmers, 
123. 
Iron-ore fields of Ontario, Miller, 552. 
Iron ores of Nipissing district, Miller, 551. 
Iron ranges of the Lower Huronian, Coleman, 
155. 
Magnetic iron sand of the St. Lawrence, 
Obalski, 572. 
Mineral statistics, Ingall, 401. 
Pioneer work in Crows Nest coal area, Blake- 
more, 65. 
Potters' clay at Middle Musquodoboit, Mason, 
528. 
Texada Island, Brewer, 77. 
Tripolite deposits of Fitzgerald Lake, Crosby, 
174. 
Vermilion River placers, Coleman, 154. 
West Gore antimony deposits, Asquith, 33. 
Colorado. 
American Nettie, Lakes, 461. 
Building and monumental stones, Lakes, 472. 
Building stones, Lakes, 473. 
Cave ore deposits, Lakes, 464. 
Cripple Creek volcano, Rickard, 647. 
Curtis coal mine, Lakes, 463. 
Economic geology, La Plata folio, Purington, 
636. 
Economic geology of the Silverton quadran- 
gle, Ransome, 639. 
Oil springs of Rio Blanco County, Lakes, 476. 
Plastic dike near Ouray, Ransome, 640. 
Prospecting for oil, Lakes, 471,475. 
