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Detail of a fossil Ichthyosaurus.
American Indian Arrowhead/Spear Point Artifact in Palm of Hand
Microraptor gui fossil, Early Cretaceous.
Ammonite inside a limestone rock. The ammonites where living between 409 and 65 million years ago (Mya). The image was captured in the canton of Aargau (Switzerland).
Ancient fish fossils are on a rock
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.
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
Trilobites
complete pyritised Leonaspis (Kettneraspis) sp. trilobite from Morocco
Magnified close up of shale with multiple trilobite fossils.
A fossil of a germanodactyl in a stone slab
Fossils of marine life.Ammonite fossils
Fossil
Knightia alta is an extinct genus of fish well-known from abundant fossils found in the Green River Formation of Wyoming, United States. They rarely exceeded 10 cm in length and are found throughout the formation. Knightia alta, Eocene Epoch, Green River Shale. Fossil.
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.
Calmitacea inside a peace of stone. The fossil was growing in the Carboniferous Period (around 360 to 300 million years ago).
Isolated on white.
elrathia Kingi trilobite fossil in gray shale matrix.
close up on Trilobite fossil isolated on white background
Fossilized fish
Keichousaurus hui sauropterygian fossil from China
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.
An eroding rock with fossil inclusions surrounded by beach rock swash deposits.  These types of rocks are fairly common to find on NW USA beaches for those with a keen eye.
Bivalvia Fossils inside a large Ammonit. Gastropods from the jurassic period.
Fossil of Trilobite - Acadoparadoxides briareus - ancient fossilized arthropod on rock - paleontology background
Fossilised Fish
trilobite fossil
Double elrathia Kingi trilobite fossils superimposed.
fossil trilobite imprinted in the sediment
Trilobite fossil of the species Metacanthina issoumourensis from  Djebel Issoumou, Morocco\nMiddle Devonian, 393 - 388 million years ago.
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