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Subject: geology
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Subject (Era): Is
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Paleozoic
Subject (Region): Is
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Illinois
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Current results range from 1957 to 1973

1.
Late Paleozoic sandstones of the Illinois Basin
Author
Potter, Paul Edwin
Published
Urbana, 1963.
Online
Online book
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online
2.
Petrology of the Paleozoic shales of Illinois
Author
Grim, Ralph E. (Ralph Early), 1902-
Published
Urbana, 1957.
Online
Report of Investigations No. 203
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online
3.
The effect of buried Niagaran reefs on overlying strata in southwestern Illinois
Author
Stevenson, D. L. (David Lloyd)
Published
Urbana, Illinois State Geological Survey, 1973.
Online
Information circular / Illinois State Geological Survey ; [no. 482]
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online