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Title: Crinoid Fossil Pieces
Caption: The stems of crinoids are composed of rounded ossicles, which often break off from the fossils. This specimen of impure Carboniferous Period limestone contains many different ossicles that became fragmented from the crinoid stems before fossilization.
Credit: Album / Science Source / BIOPHOTO ASSOCIATES
Image size: 5134 × 3407 px | 50.0 MB
Print size: 43.5 × 28.8 cm | 2021.3 × 1341.3 in (300 dpi)