Report on the Geology and Topography of a Portion of the Lake Superior Land District in the State of Michigan: The iron region, together with the general geologyHouse of Reps., 1851 |
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Report on the Geology and Topography of a Portion of the Lake Superior Land ... John Wells Foster,Josiah Dwight Whitney Sin vista previa disponible - 2016 |
Términos y frases comunes
appear azoic Bay des Noquets beaches beds belt calcareous calciferous sandstone carbonate carboniferous Carp river character chlorite cliffs Clinton group coast color conglomerate copper correction line crystalline crystals deposits Devonian distance district drift dunes east elevation Escanaba Escanaba river extending feldspar fossils geological granite Green Bay height hornblende Hudson-river group hundred feet Huron igneous igneous rocks inches island Isle Royale Keweenaw Point Lake Huron Lake Michigan Lake Superior layers lime limestone lower Silurian Mackinac magnesia magnetic mass Menomonee Menomonee river meridian miles mineral nearly Niagara group northern numerous observed occur Onondaga oxide pebbles peroxide of iron Plate portion Potsdam Potsdam sandstone quartz range region ridges rise river sand seen shale shaly shore of Lake silica silicious slates south-west species specimens strata stratified striæ surface terraces thickness tion township trace trap trappean rocks Trenton limestone upper Helderberg veins York