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Petroleum Geology of the State of Washington: Usgs Professional Paper 1582

Petroleum Geology of the State of Washington: Usgs Professional Paper 1582

Paperback

General Political Science

Publisher Price: $16.75

ISBN10: 128702128X
ISBN13: 9781287021285
Publisher: Bibliogov
Published: Mar 28 2013
Pages: 50
Weight: 0.24
Height: 0.10 Width: 7.44 Depth: 9.69
Language: English
Paleomagnetic and 40Ar/39Ar results from mafic dikes and sills in northwestern Wyoming and western Montana yield similar virtual geomagnetic poles and isotopic dates. In combination with paleomagnetic and geochronologic data from elsewhere in the western Cordillera, these data provide evidence for a regional mafic magnetic event at 780 to 770 Ma that affected a large area of western North America.

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General Political Science