Geology of Scott County, Iowa, and Rock Island County, Illinois, and the Adjacent Territory: Showing the Geographical and Vertical Range of the Fossils of the Niagara, Corniferous, and Hamilton Groups of Rocks, and the Chemung Group at Burlington, Iowa : with Supplement (Google eBook)

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Glass & Hoover, printers and binders, 1885 - Geology - 34 pages
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Page 9 - Being thus protected by the older and harder Niagara rocks, they have escaped subsequent erosion, while the higher
Page 5 - and is speckled with dendrite markings. The layers, although thin-bedded, are so uncouth and rough that no mason could build them into a handsome wall. The bottom layers are of a dull green color, and soon pass into the underlying Cincinnati shales.
Page 5 - At Fulton City the upper part of the quarry, at least, is a friable yellow-colored or ocherous limestone, sometimes porous or
Page 5 - About a mile above Sterling, on the north bank of the river, a series of Niagara quarries are extensively worked. The formation here is worked down about thirty-five feet, and the rock is full of
Page 9 - below the ocean again, the deposition of the rocks under consideration took place, filling the
Page 12 - was at last rewarded, in February, 1882, by finding great numbers of fossils in
Page 19 - No fossils have been published as having been collected in the Corniferous or Upper Helderberg in either of these counties in the
Page 24 - OF THE HAMILTON GROUP COLLECTED IN SCOTT COUNTY, IOWA, AND ROCK ISLAND COUNTY, ILLINOIS.

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