J0011 ?Crenulopteris subcrenulata
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 18mm X 10mm (11/16" x 3/8"). MILD SULFURIC ACID BATH.
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Photo by Mark Kmiecik
By Mark Kmiecik
BOTH HALVES SIDERITE CONCRETION, SEPARATED BY FREEZE/THAW METHOD & LIGHT HAMMER BLOW. SPECIMEN 18mm X 10mm (11/16" x 3/8"). MILD SULFURIC ACID BATH.
By Nimravis,
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