Ixtaclum Shale
The Ixtaclum Shale is a geologic formation in Mexico. It preserves fossils dating back to the Paleogene period. See alsoReferencesExternal links
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Ixtaclum Shale
The Ixtaclum Shale is a geologic formation in Mexico. It preserves fossils dating back to the Paleogene period. See alsoReferencesExternal links
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