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Author Hemming, S. R., author.

Title Precambrian crustal blocks in Minnesota : neodymium isotope evidence from basement and metasedimentary rocks / by S.R. Hemming, G.N. Hanson, and S.M. McLennan.

Publication Info. [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1995.
[Washington, D.C.] : United States Government Printing Office


Location Call No. OPAC Message Status
 Axe Federal Documents Online  I 19.3:1904-U    ---  Available
Description 1 online resource (iii, 15 pages) : illustrations, maps.
text txt rdacontent
computer c rdamedia
online resource cr rdacarrier
Series Contributions to Precambrian geology of Lake Superior region ; ch. U
U.S. Geological Survey bulletin ; 1904-U
Contributions to Precambrian geology of Lake Superior region ; ch. U.
U.S. Geological Survey bulletin ; 1904-U.
Bibliography Includes bibliographical references (pages 13-15).
Summary Sm-Nd survey of Precambrian granitic and metasedimentary rocks collected from several geophysically defined blocks in central Minnesota confirms the presence of some fundamental geologic boundaries previously mapped on the basis of structure. The Malmo discontinuity an Early Proterozoic structure separates the Archean Minnesota River Valley ter- ranes from an Early Proterozoic (Penokean magmatic) terrane and the McGrath Gneiss dome of east-central Minnesota North of this boundary, the Penokean fold-and-thrust belt can be divided into fault-bounded terranes that were assembled during the Penokean orogeny. Each terrane within the study area has distinct crust formation ages.
Note Description based on print version record.
Access Use copy Restrictions unspecified star MiAaHDL
Reproduction Electronic reproduction. [S.l.] : HathiTrust Digital Library, 2011. MiAaHDL
System Details Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. MiAaHDL
Processing Action digitized 2011 HathiTrust Digital Library committed to preserve pda MiAaHDL
Subject Geology, Stratigraphic -- Precambrian.
Samarium-neodymium dating -- Minnesota.
Geology -- Minnesota.
Geology. (OCoLC)fst00940627
Geology, Stratigraphic. (OCoLC)fst00940727
Precambrian Geologic Period. (OCoLC)fst01354070
Samarium-neodymium dating. (OCoLC)fst01104519
Minnesota. (OCoLC)fst01204560
Chronological Term From 570 million to 5 billion years ago
Added Author Hanson, Gilbert N., author.
McLennan, Scott M., author.
Geological Survey (U.S.), issuing body.
Added Title Neodymium isotope evidence from basement and metasedimentary rocks
Technical Report Archive & Image Library (TRAIL)
Other Form: Print version: Hemming, S. R. Precambrian crustal blocks in Minnesota (DLC) 95000649 (OCoLC)32746723
Gpo Item No. 0620 (online)
Sudoc No. I 19.3:1904-U

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