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Credit Photo by Mark Kmiecik

J0021 Septarian

Mark Kmiecik

By Mark Kmiecik

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BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 37mm X 30mm (1-7/16" x 1-3/16"). MILD SULFURIC ACID BATH APPLIED.

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Photo by Mark Kmiecik

From the album:

Mark's Mazon Creek Fossils

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