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 |
Dentro del libro
Resultados 1-5 de 48
Página ix
... Keweenaw Point and the Ontonagon region , 117-118 . Examples of diagonal stratification , 118. Its character and relations to the preexisting rocks at Granite Point , 119. Carp river , 123. Presqu'isle , 121. Fissures , 120. Grand ...
... Keweenaw Point and the Ontonagon region , 117-118 . Examples of diagonal stratification , 118. Its character and relations to the preexisting rocks at Granite Point , 119. Carp river , 123. Presqu'isle , 121. Fissures , 120. Grand ...
Página 3
... Keweenaw Point , Isle Royale and the Ontonagon region ; and , although composed of nearly the same constituents as many of the older igneous rocks , there is no difficulty , from the diversity in external characters , in drawing the ...
... Keweenaw Point , Isle Royale and the Ontonagon region ; and , although composed of nearly the same constituents as many of the older igneous rocks , there is no difficulty , from the diversity in external characters , in drawing the ...
Página 6
... point south of Washington Harbor , as well as the various reefs , consists of conglomerate passing into sandstone ; and we have no evidence of the invasion of the trap between this line and the southern coast . Keweenaw Point is the ...
... point south of Washington Harbor , as well as the various reefs , consists of conglomerate passing into sandstone ; and we have no evidence of the invasion of the trap between this line and the southern coast . Keweenaw Point is the ...
Página 7
... Keweenaw Bay , it presents a series of gentle undulations . A short distance above the Methodist Mission at L'Anse , it is seen reposing unconformably on the slates of the azoic system . From this point ... points by igneous rocks , both ...
... Keweenaw Bay , it presents a series of gentle undulations . A short distance above the Methodist Mission at L'Anse , it is seen reposing unconformably on the slates of the azoic system . From this point ... points by igneous rocks , both ...
Página 16
... point in section 6 , being five hundred and ninety - two feet above the lake . The quartz has been so far ... Keweenaw Point do to the conglomerates . Many of the slates appear to be composed of pulverulent greenstone , as though they ...
... point in section 6 , being five hundred and ninety - two feet above the lake . The quartz has been so far ... Keweenaw Point do to the conglomerates . Many of the slates appear to be composed of pulverulent greenstone , as though they ...
Otras ediciones - Ver todas
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