C0092 Annularia inflata
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 50mm X 40mm (2" x 1-7/16"). CONCAVE HALF IS CRACKING DUE TO PYRITE DISEASE?
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Photo by Mark Kmiecik
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By Mark Kmiecik
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. SPECIMEN 50mm X 40mm (2" x 1-7/16"). CONCAVE HALF IS CRACKING DUE TO PYRITE DISEASE?
By cmsmith9,
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