scholarly article by Michael Churkin et al published 1979 in Geology
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scholarly article by Warren J. Nokleberg & Michael Churkin published 1980 in Geology
scholarly article by Michael Churkin & Warren J. Nokleberg published 1980 in Geology
scholarly article by Warren J. Nokleberg & Michael Churkin published 1980 in Geology
scholarly article by Michael Churkin & Warren J. Nokleberg published 1980 in Geology
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scholarly article
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scholarly article by Michael Churkin published 1974 in Geology
scholarly article by Michael Churkin & Claire Carter published 1970 in Geological Survey Professional Paper
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scientific article published in 1965
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scholarly article by Michael Churkin published 1973 in Geological Survey Professional Paper
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scholarly article by Earl E. Brabb & Michael Churkin published 1969 in Open-File Report
scholarly article by Earl E. Brabb & Michael Churkin published 1964 in Open-File Report
scholarly article by Earl E. Brabb & Michael Churkin published 1965 in Open-File Report
scholarly article by Michael Churkin & Claire Carter published 1996 in Geological Survey Professional Paper
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