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Publication Extents

Not all publications have extents, not all extents are completely accurate
The geology of the Lake Superior region
Charles Richard Van Hise, Charles Kenneth Leith
1911, Monograph 52
The Lake Superior region is a part of the southern margin of the great pre-Cambrian shield of northern North America.  It is bordered and overlapped on the south by Paleozoic rocks of the Mississippi Valley and on the southwest by Cretaceous deposits.  The pre-Cambrian rocks of the area, which may...