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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.
Microscopic photo of a thin section of calcareous tufa of Holocene age.
Ancient fish fossils are on a rock
Ammomite (Ammomoideae) fossil imprint on a limestone. The image was captured in the canton of schaffhausen during springtime.
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.
Trilobites fossil from Middle Ordovician Era. Selective focus
close up on Trilobite fossil isolated on white background
Fossil remains of a lizard on a stone.
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.
Magnified close up of shale with multiple trilobite fossils.
isolated on black.
Calmitacea inside a peace of stone. The fossil was growing in the Carboniferous Period (around 360 to 300 million years ago).
Trilobite Paradoxides spiulosus
Ammonite and Orthoceras Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco
fern plant fossil as very nice natural background
Natural ecology, stone, rust, texture, background, abstract, plain stone, rock, building material, shape, solid, marble, granite, sea stone, wall, floor, stone wall, color, nature, simplicity
prehistoric under water life form
elrathia Kingi trilobite fossil in gray shale matrix.
Seashell fossil embedded in rock. Fossilized shell in the turkey.
Adventures in the Southwest USA, paleontologist at work
Mud Whelk, Merimbulla, NSW, June 2022
coral fossil texture as very nice geology background
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).
Fossil of a large shell in yellow-red limestone. Coast of Algarve, Portugal
Rheum officinale, Chinese rhubarb, Rheum palmatum L.
Beautiful fossil of some sort of dinosaur reptile from Madagascar, isolated on a white background
Double elrathia Kingi trilobite fossils superimposed.
A trilobite fossil
Salt formations on the stones of Garmasr salt cave in Iran
Free Images: "bestof:Fossil Birkenia Woodward.png en Restoration of the agnate Birkenia elegans from the late Silurian of Lanarkshire Scotland NOTE According to later restorations"
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