Bulletin, Issues 251-256U.S. Government Printing Office, 1905 - Geology |
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Alaska anticline assay basalt basin bed rock bench Birch Creek Butte calcite canyon cent clay coal Cochran Mills Conemaugh County craters Cripple Creek Crook County Crooked Creek Crooked River cupel deposits depth Deschutes Deschutes River dikes district drilled east Economic geology Elders Ridge quadrangle elevation erosion extends Fairbanks fault feet thick field flows fluorite fluorspar Fork formation Fortymile Freeport galena Genevieve limestone Geol Girty glaciers gold gravels hills igneous inches Lake lapilli lava limestone lower Malheur miles minerals mines Mountains northeast northwest occur Oregon outcrops Philadelphia Co Pittsburg Pittsburg coal plain Plum Creek portion present Prineville probably quartz reconnaissance region rhyolitic Roaring Run Rosiclare sand sandstone schists seam Seventymile shaft shale sheet shows side slopes spar stream surface syncline Tanana tion tributaries tuff U. S. GEOLOGICAL SURVEY Upper Freeport coal valley vein vicinity volcanic West Lebanon
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Page vi - SCHRADER, FC, and SPENCER, AC The geology and mineral resources of a portion of the Copper River district, Alaska.
Page vi - Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Page viii - Twenty-first Ann. Rept,, pt. 2, 1900. TG Gerdine. Lynn canal, routes from, via headwaters of White and Tanana rivers to Eagle City; scale, 1:625000. Contained in "A reconnaissance from Pyramid Harbor to Eagle City, Alaska.
Page 99 - IS, crater No. 2. About the northern portion of the basin the encircling mountains, although precipitous, do not rise in vertical cliffs. The rocks are dark, and in places reveal red and brown colors, in contrast with the gray cliffs inclosing the great depression on the south. Those on the north border of Pauline Lake are dark and massive, having the appearance of basalt, and in part consist of thick beds of agglomerate containing many volcanic bombs. The beds are inclined southward or toward Pauline...
Page xxxiv - Bureau." it will be seen that this portion of central Oregon, lying in the northern part of the extensive arid region which intervenes between the Rocky Mountains on the east and the Sierra Nevada and the Cascade Mountains on the west, is credited with a mean annual rainfall of between 10 and 20 inches.