fossil
Fossilized Bivalve in Limestone
Class Bivalvia within Sedimentary Matrix (likely CaCO3)
Hardness: 3-4 (matrix), color: tan to light brown, luster: dull/earthy, features distinct shell imprints and internal molds.
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Physical properties
Hardness: 3-4 (matrix), color: tan to light brown, luster: dull/earthy, features distinct shell imprints and internal molds.
Formation & geological history
Formed through the lithification of calcium-rich marine sediments; fossil age often ranges from the Paleozoic to Mesozoic eras.
Uses & applications
Scientific study, educational display, and amateur fossil collecting.
Geological facts
Bivalves are one of the most successful groups of marine animals and have existed for over 500 million years.
Field identification & locations
Look for symmetrical shell patterns or tiered ridges within sedimentary rocks. Commonly found in creek beds or limestone quarries.
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