Geology and mineral resources of the Hennepin and La Salle quadrangles (Google eBook)

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State Geological Survey, 1919 - Geology - 136 pages
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Page 15 - The Chicago and Northwestern, the Chicago, Milwaukee, and St. Paul, and the Chicago, Indiana, and Southern railroads also enter the area.
Page 113 - Geological Survey Bull. 4, p. 166, 1907 The sample of blue clay was slightly bunt and showed a glassy fracture at cone 22 under reducing conditions. Under oxidizing conditions it was still straight though not carried beyond the vitrification point at cone 30. The very high period of fusion indicates that this clay may be first class for fire brick. The yellow clay was not vitrified...
Page 4 - Francis W . Shepardson, Chairman, and Members of the Board of Natural Resources and Conservation: GENTLEMEN: I submit herewith a report on the Artesian Waters of Northeastern Illinois, and recommend that it be published as Bulletin 34.
Page 9 - FIG. 3. — Diagram illustrating a structural unconformity, such as that existing between the coal-bearing strata and underlying rocks as at Split Rock and Deer Park. Reproduced by permission of the University of Chicago Press. the Mississippian and the older rocks and occur as surface formations below the drift over much of north central Illinois, the outcrop crossing the northern part of La Salle and Bureau counties. The Pennsylvanian series is made up largely...
Page 4 - Chairman, and Members of the Board of Natural Resources and Conservation. GENTLEMEN: — I submit heiewith a report on the Geology and Mineral Resources of the Hennepin and La Salle Quadrangles, by Gilbert H. Cady, and recommend that it be published as Bulletin No. 37. The field work was done under the joint auspices of the US Geological Survey and the Illinois Geological Survey Division. Much of the...
Page 10 - FIG. 16. — Boulder of pisolitic limestone from the Pottsville formation of southwestern Illinois. Similar to boulders found in the Starved Rock region. Reproduced by permission of the University of Chicago Press. The stratigraphic section as described in the preceding paragraphs holds in general for the Deer Park region. The succession at other places varies, as has been stated, with the omission or better development of one or more of the strata...

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Illinois - Printed Sources
Geology and Mineral Resources of The Hennepin and La Salle Quadrangles, Bulletin 37, by gh Cady, Urbana: 1919. Geology and Mineral Resources of the Herscher ...
quarriesandbeyond.org/ states/ il/ il-printed_sources.html

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