Paleomagnetic and ⁴°Ar/³⁹Ar geochronologic data from Late Proterozoic mafic dikes and sills, Montana and Wyoming /

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Bibliographic Details
Author / Creator:	Harlan, Stephen S., author.
Imprint:	Washington : United States Government Printing Office, 1997.
Description:	1 online resource (16 pages) : illustrations, maps.
Language:	English
Series:	U.S. Geological Survey professional paper ; 1580 U.S. Geological Survey professional paper ; 1580.
Subject:	Geology, Stratigraphic -- Proterozoic. Geochronometry -- Montana. Geochronometry -- Wyoming. Sills (Geology) -- Montana. Dikes (Geology) -- Wyoming. Dikes (Geology) Geochronometry. Geology, Stratigraphic. Proterozoic Geologic Period. Sills (Geology) Montana. Wyoming.
Format:	E-Resource U.S. Federal Government Document Book
URL for this record:	http://pi.lib.uchicago.edu/1001/cat/bib/11597780

Hidden Bibliographic Details
Other authors / contributors:	Geissman, John William, author. Snee, Lawrence W., author. Geological Survey (U.S.), issuing body.
Notes:	"Paleomagnetic and 40Ar/39Ar results from mafic dikes and sills in northwestern Wyoming and western Montana indicate that they were emplaced during a regional magmatic event at 780 to 770 Ma." Includes bibliographical references (pages 14-16). Description based on online resource, PDF version; title from PDF title page (USGS, October 16, 2014).
Other form:	Print version: Harlan, Stephen S. Paleomagnetic and ⁴⁰Ar/³⁹Ar geochronologic data from Late Proterozoic mafic dikes and sills, Montana and Wyoming
GPO item no.:	0624 (online)
Govt.docs classification:	I 19.16:1580

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