Report of the Geological Exploration of the Fortieth Parallel, Made by Order of the Secretary of War, Volume 11870 |
Common terms and phrases
andesite anticlinal apatite Archæan argillaceous augite basalt base basin beds biotite body Bridger calcareous Cambrian Cañon carbonate Carboniferous characteristic clays Coal Measure color Colorado Range conformable conglomerate Cretaceous crystalline crystals dacite deposits dioritic east eastern Eocene erosion eruptions exposed exposure feet thick feldspar flanks foot-hills forms Fortieth Parallel fossils Fox Hill geological glaciers gneisses granite gray Green River groundmass horizon hornblende intercalated Jurassic Lake Laramie lime limestone lower marls Marsh mass material mica microscope miles minerals Miocene Mountains northern observed occur orthoclase outcrops overlaid overlying Paleozoic Park Pass Peak plagioclase Plains plateau Pliocene Productus propylite quartz quartzite Quaternary region rhyolite ridge sandstones sanidin schists sediments seen shales Shoshone Sierra Nevada siliceous slopes strata summit surface Tertiary trachytes Trias Triassic Uinta unconformably Upper Coal Measure valley Vermilion Creek Wahsatch limestone western westward whole Zirkel