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Geology, Stratigraphic--Paleozoic
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Geology, Stratigraphic--Ordovician
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Ellenburger Group (Tex.)
Ellenburger Group (Tex.)
Geographic
sh90005306
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id.loc.gov
Broader Terms (2)
Geology, Stratigraphic--Ordovician
Groups (Stratigraphy)--Texas
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