8" Alethopteris Fern Plant Leaf Fossil Carboniferous Age Llewellyn FM ST Clair, PA brachiopod where metasomatism replaces calcite with
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8" Alethopteris Fern Plant Leaf Fossil Carboniferous Age Llewellyn FM ST Clair, PA brachiopod where metasomatism replaces calcite with where metasomatism replaces calcite with fluorite Ichthyosaurs represent one of the most successful reptilian adaptations to marine life Dimensions: 8 Inches Long The fossilization process began with pyrite replacing the plant tissues