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![](./img/clear.gif) 1.- Composition, age, and petrogenesis of Late Cretaceous intrusive rocks in the Central Big Belt Mountains, Broadwater and Meagher Counties, Montana
Du Bray, Edward A.; Snee, Lawrence W.
[Reston]: U.S. Geological Survey, 2002
U.S. Geological Survey Professional Paper
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![](./img/clear.gif) 2.- Paleomagnetic and Ar-40/Ar39 results from the Gant intrusive breccia and comparison to the Permian Downey Bluff sill: Evidence for permian igneous activity at Hicks Dome, southern Illinois basin
Goldhaber,Martin; Reynolds, Richard; Snee, Lawrence W.
Washington: USGS, 1997
U.S. Geological survey Bulletin
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