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Read before the Cordilleran Section April 13 1934
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Allegheny Allegheny Front anticline basalt beach beds bench Bergen Park boulders Bull CaCOs Cambrian Canyon fault caverns clay concretions conglomerate correlation County Creek Cretaceous deposits dolomite drainage east eastern Edaphosaurus elevation Eocene erosion Eryops evidence exposures fault blocks fault zone fauna feet Figure folding formation forms Franciscan Geol Geological glacial glauconite gneiss grains granite gravels hilltops Hinckley horizon Huronian Keweenawan layers limestone locality lower miles minerals Miocene Mount Diablo Mountain peneplain occur ostracodes outcrops Overland Mountain Palmer gneiss peneplane Peninsular Range Pennsylvania Permian Petaluma plateau Pliocene present probably quadrangle quartz quartzite redbeds region ridge River rocks Ross Shelf Ice sand sandstone scarp sea level sediments shale Shelf Ice side silt slope specimens strata stratigraphic streams structure Surv syncline Tertiary thickness tion tuff unconformity uplift upper valley vertebrate volcanics Wichita writer