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1st Author:
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Boardman, Darwin R.
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2nd Author:
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Work, David M.
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3rd Author:
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Year:
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2004 |
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Title:
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Stratigraphic distribution of the ammonoids Shumardites and Vidrioceras and implications for the definition of the global Gzhelian Stage, Upper Pennsylvanian Series, Upper Pennsylvanian Series. |
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Reference:
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Newsletter on Carboniferous Stratigraphy, 22: 23-27, 2 fig. |
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Keywords:
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U.Carbon.,Pennsylv.;Gzhel.,Vir |
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Link:
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