The Subsurface Geology of Freedom Township in the Baraboo Iron-bearing District of Wisconsin
Author: Robert Gordon Schmidt
Publisher:
Published: 1951
Total Pages: 128
ISBN-13:
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Author: Robert Gordon Schmidt
Publisher:
Published: 1951
Total Pages: 128
ISBN-13:
DOWNLOAD EBOOKAuthor: Samuel Weidman
Publisher:
Published: 1904
Total Pages: 260
ISBN-13:
DOWNLOAD EBOOKAuthor: Samuel Weidman
Publisher:
Published: 1904
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Samuel Weidman
Publisher: Forgotten Books
Published: 2015-07-04
Total Pages: 250
ISBN-13: 9781330719053
DOWNLOAD EBOOKExcerpt from The Baraboo Iron-Bearing District of Wisconsin The following report describes the Baraboo district of south ern Wisconsin, a district which has lately come into prominence on account of the discovery of iron ore. Field work was begun in the district May 4, 1903, and the larger part of three months was devoted to the mapping of outcrops of quartzite and a study of the geologic structure of the district. In the field the writer was assisted by Mr. W. D. Smith. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Gene L. LaBerge
Publisher:
Published: 1991
Total Pages: 346
ISBN-13:
DOWNLOAD EBOOKA reconnaissance study carried out in conjunction with regional geologic mapping.
Author: Ian W. D. Dalziel
Publisher:
Published: 1970
Total Pages: 188
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1983
Total Pages: 228
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DOWNLOAD EBOOKAuthor: Geological Survey (U.S.)
Publisher:
Published: 1976
Total Pages: 202
ISBN-13:
DOWNLOAD EBOOKAuthor: Gene L. LaBerge
Publisher:
Published: 1991
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKProterozoic quartzite is exposed at several isolated localities within an area of nearly 13,000 square kilometers in Wisconsin. Although early workers proposed that the quartzite is of two different ages, more recent workers have suggested that the various quartzite bodies are correlative, and that their protoliths were deposited between 1,760 and 1,630 Ma. Structural and stratigraphic studies of the quartzite deposits together with new age data indicate that the quartzite is at least of two distinct ages. Quartzite at McCaslin and Thunder Mountains, in northeastern Wisconsin, is older than 1,812 Ma, as indicated indirectly by a dated intrusion, and quartzite boulders in conglomerates in central Wisconsin are at least as old as the rhyolite country rock (=1,840 Ma). Deformed quartzite at Hamilton Mounds, in south-central Wisconsin, is intruded by undeformed granite that is 1,764 Ma. The ages of many other quartzite bodies, however, cannot be tightly constrained at present. Quartzite exposed in central and southern Wisconsin, south of the Eau Pleine shear zone, is interpreted as remnants of a passive margin sequence that was deposited on an Archean microcontinent (Marshfield terrane) and subsequently deformed in a major south-verging fold-thrust system during collision between the microcontinent and oceanic-arc rocks of the Pembine-Wausau terrane. The occurrence of quartzite-bearing conglomerates in the 1,860 Ma volcanic rocks of the Marshfield terrane suggests that the allochthonous quartzite bodies are 1,860 Ma or older. Collision occurred at about 1,840 Ma, and marked the end of the Penokean orogeny.
Author: James D. Miller
Publisher: Geological Society of America
Published: 2011-01-01
Total Pages: 593
ISBN-13: 0813700248
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