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The geology of the Lake Superior region

Monograph 52

By:
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Abstract

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 be divided into a considerable number of lithologic and time units, contain the great iron and copper deposits by which the region is most widely known.  The great development of the mineral industry in this region has afforded the geologist unusual opportunity for study, as it has not only made the region more accessible but has justified larger expenditures for geologic study than would otherwise have been made.  This fortunate combination of a field containing an exceptionally full record of a little-known part of the geologic column with the means of studying it has warranted the study of the pre-Cambrian with a degree of detail that has been practicable in but few other significant pre-Cambrian regions.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
The geology of the Lake Superior region
Series title:
Monograph
Series number:
52
Year Published:
1911
Language:
English
Publisher:
U.S. Government Printing Office
Publisher location:
Washington, D.C.
Description:
Report: 641 p.; 8 Plates: 108.96 x 28.28 inches or smaller
Country:
United States
Other Geospatial:
Lake Superior
Scale:
22500
Online Only (Y/N):
N
Additional Online Files (Y/N):
N