The Resource New observations on the age and structure of Proterozoic quartzites in Wisconsin, by Gene L. Laberge, J.S. Klasner, and Paul E. Myers

New observations on the age and structure of Proterozoic quartzites in Wisconsin, by Gene L. Laberge, J.S. Klasner, and Paul E. Myers

Label
New observations on the age and structure of Proterozoic quartzites in Wisconsin
Title
New observations on the age and structure of Proterozoic quartzites in Wisconsin
Statement of responsibility
by Gene L. Laberge, J.S. Klasner, and Paul E. Myers
Title variation
Age and structure, Proterozoic quartzites, Wisconsin
Creator
Contributor
Author
Subject
Language
eng
Summary
Proterozoic 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
Member of
Action
will digitize
Cataloging source
DLC
http://bibfra.me/vocab/lite/collectionName
Technical Report Archive & Image Library (TRAIL)
http://library.link/vocab/creatorName
LaBerge, Gene L
Dewey number
  • 557.3 s
  • 552/.4
Government publication
federal national government publication
Illustrations
  • illustrations
  • maps
Index
no index present
LC call number
QE75
LC item number
.B9 no. 1904-B
Literary form
non fiction
NAL call number
407
NAL item number
G29B no.1904-B
Nature of contents
bibliography
http://library.link/vocab/relatedWorkOrContributorName
  • Klasner, J. S.
  • Myers, Paul E.
  • Geological Survey (U.S.)
Series statement
  • Contributions to Precambrian geology of Lake Superior region
  • U.S. Geological Survey bulletin
Series volume
  • ch. B
  • 1904-B
http://library.link/vocab/subjectName
  • Quartzite
  • Geology, Stratigraphic
  • Geology, Structural
  • Geology, Stratigraphic
  • Geology, Structural
  • Proterozoic Geologic Period
  • Quartzite
  • Wisconsin
Label
New observations on the age and structure of Proterozoic quartzites in Wisconsin, by Gene L. Laberge, J.S. Klasner, and Paul E. Myers
Link
http://pubs.er.usgs.gov/usgspubs/index.jsp?view=adv
Instantiates
Publication
Note
Shipping list no.: 1992-146-P
Bibliography note
Includes bibliographical references (pages 16-18)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Dimensions
28 cm.
Extent
iii, 18 pages
Lccn
90003787
Media category
unmediated
Media MARC source
rdamedia
Media type code
  • n
Other physical details
illustrations, maps
System control number
  • (OCoLC)21909861
  • (OCoLC)ocm21909861
Label
New observations on the age and structure of Proterozoic quartzites in Wisconsin, by Gene L. Laberge, J.S. Klasner, and Paul E. Myers
Link
http://pubs.er.usgs.gov/usgspubs/index.jsp?view=adv
Publication
Note
Shipping list no.: 1992-146-P
Bibliography note
Includes bibliographical references (pages 16-18)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Dimensions
28 cm.
Extent
iii, 18 pages
Lccn
90003787
Media category
unmediated
Media MARC source
rdamedia
Media type code
  • n
Other physical details
illustrations, maps
System control number
  • (OCoLC)21909861
  • (OCoLC)ocm21909861

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