Bulletin of the Geological Society of America, Band 40

Abstract Arctic asthenolith asthenosphere Bailey Willis basin bed number Bulletin Calif California Cambrian Chamberlin CHARLES coast continental correlation Cretaceous D. C. Dec December Department of Geology deposits Devonian Diastrophism Died Diller earth east eastern Eocene erosion evidence faults fauna feet folding formation forms fossils Geol Geological Society Geologist GEORGE glacial granite gravel Huronian Ibidem interglacial Iowa Island Journal of Geology Kansan Klamath Mountains Lake limestone lower magma Mass Mesozoic miles Mineral Miocene Mountains Museum N. Y. Dec northern Ohio Ordovician Oregon origin overthrust Paleontological Paleozoic paper peneplain Penrose Medal Permian planetesimal Pleistocene Pliocene Precambrian present quartzite Range region Report River rocks sandstone sediments shale Silurian Society of America species stage stratigraphic stream structure surface Tertiary Texas thickness tion Triassic trough types U. S. Geological Survey United States Geological University Upper valley varves volume Washington WILLIAM Wisconsin York zone