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fossil trilobite imprinted in the sediment
Ohio Dovetail - Arrowhead - Isolated
close up on Trilobite fossil isolated on white background
Ammonite fossils in limestone. The ammonites where living between 409 and 65 million years ago (Mya). The fossils where found in the canton of Aargau (Switzerland).
Small Insect fossil on stone
Magnified close up of shale with multiple trilobite fossils.
Phacops rana (Eldredgeops rana) is a species of trilobite from the middle Devonian period
Ancient fish fossil in stone
Trilobites
American Indian Arrowhead/Spear Point Artifact in Palm of Hand
Trilobite Elrathia kingii\nexcavated in Millard Co. Utah, U.S.A
Calmitacea inside a peace of stone. The fossil was growing in the Carboniferous Period (around 360 to 300 million years ago).
Archaeopteryx marble imprint, fossilized imprint, imprint transitional form (mosaic form), of a theropod dinosaur. Replica of a lime-impression (limestone slab) from the Jurassic about 150 million years old.
close up on Trilobite fossil isolated on white background
Trilobite fossil on stone, prehistoric extinct animal lived in Cambrian and Silurian seas. Big trilobite fossil of prehistoric era and rock. Concept of paleontology, evolution and Paleozoic fossil.
Double elrathia Kingi trilobite fossils superimposed.
Mammoth tooth isolated on a white background (30,000 years old)
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
Ancient fish fossils are on a rock
Bivalvia Fossils inside a large Ammonit. Gastropods from the jurassic period.
trilobite stone fossil sample with ridges and detail
Devonian fossils in limestone matrix include bryozoa, crinoid, and brachiopod fossils. Largest pieces are about 1/2 inch (10 mm). Fossil and Prairie Park Preserve, Silos and Smokestacks National Heritage Area, Rockford, Iowa, USA.
close up on fish fossil fish in the rock
Large elrathia Kingi trilobite fossil in gray shale matrix.
trilobite fossil texture as nice natural background
Trilobite fossil of the species Metacanthina issoumourensis from  Djebel Issoumou, Morocco\nMiddle Devonian, 393 - 388 million years ago.
Geologist holding fossil and geological hammer close up
Sea Urchin spine fossil.  The close-up image shows a  sea urchin fossil from the jurassic period inside a limestone.
A background texture of ammonite fossils embedded in rock.
Rheum officinale, Chinese rhubarb, Rheum palmatum L.
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