Today Me and Roz hunted an exposure of the Walnut formation in Parker County, Texas. Here you can see the dramatic change between the limestone/marl of the Walnut formation and the sandstone of the underlying Paluxy formation. | ||
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![]() (pic by Roz) |
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Engonoceras ammonite![]() |
Ceratostreon weatherfordensis? oyster![]() |
Roz's Holectypus echinoid![]() (pic by Roz) |
(same)![]() (pic by Roz) |
Roz's other Holectypus echinoid![]() (pic by Roz) |
Arca? clam (internal mold)![]() |
(same)![]() |
Roz's Salenia mexicana? echinoid![]() |
Heteraster echinoid![]() |