Report of a geological survey of Wisconsin, Iowa, and Minnesota: and incidentally of a portion of Nebraska Territory. Made under instructions from the United States Treasury department
David Dale Owen, Joseph Leidy, Joseph Granville Norwood, Charles Christopher Parry, Henry Pratten, Benjamin Franklin Shumard, Charles Whittlesey, United States. General Land Office
Lippincott, Grambo & co., 1852 - Birds - 638 pages
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Ammonites amygdaloidal angle appearance argillaceous banks basaltic bearing beds bluffs boulders breccia calcareous spar carboniferous Chippewa clay coal colour compact conglomerate contains Creek Croix crystalline deposits dike Dikelocephalus distance drift east elevation exposed exposure Falls of St feet high felspar ferruginous fifty feet fine-grained formation fossil fracture fragments granite gray greenstone half a mile height hills hornblende hundred feet hundred yards inches Iowa Island Lake Superior layers Louis River Lower Magnesian Limestone Magnesian Limestone metamorphosed mineral Mississippi Moines molars mouth nearly northeast northwest numerous Oreodon Peter's pine plates porphyritic portage portion prairie premolar quartz range rapids resembles ridge rock sand sandstone sandy seams seen shales shaly shore side siliceous slate soil southeast species specimens strata stream surface syenite thin Township trap traversed Trilobite Turkey River twenty feet upper valley veins water-level Wisconsin wood zeolites