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The top documents tagged [archean crust]
Proterozoic sedimentary rocks –in Glacier National Park, Montana The angular peaks, ridges and broad valleys –were carved by Pleistocene and Recent glaciers
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Abrasives ©2009 Dr B C Paul Acknowledgement is given to the following sources SME Industrial Minerals, mcrocks.com, geology.com, webmineral.com, mindat.org,
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Chapter 9
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