A group of sea urchin needles, a Carboniferous fossil in limestone

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A group of sea urchin needles, a Carboniferous fossil in limestone. Close-up, selective focus and white background.

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Size: 4174px × 3744px
Photo credit: © Olga Popkova / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: animal, archaeological, archeology, biology, calcarea, carbon, dig, discover, era, excavations, extinct, extinction, fiber, fossil, fossilized, geological, geology, limestone, natural, nature, palaeontology, paleontology, petrified, porifera, rock, sea, specimen, sponge, stone, urchin