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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.
Model Dinosaur fossil
Fossil of an amphibian, sclerocephalus auseris.
Fossil Fern inside a peace of slate. The fossil is more than 100 mio Years old.
Keichousaurus hui sauropterygian fossil from China
Close up of a multitude of fossil crinoids
Fossil Fern / Odontopteris sp.350 million years ago
Leaf pattern on a stone wall
Ancient fish fossils are on a rock
Primitive Living Fossil
Fossil of ancient reptile in the rock
Sea Urchin spine fossil.  The close-up image shows a  sea urchin fossil from the jurassic period inside a limestone.
Detail of a fossil Ichthyosaurus.
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 shot of a prehistoric creature.
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.
Seymouria (Seymouria baylorensis) from the Early Permian Period found as fossil in North America. Extinct prehistoric animals.
Fossilised Fish
Detail os the fossil of a prehistoric frog
Three different types of rocks in sunlight, forming shadows. Kaolinite, Montmorillonite, clay minerals
original Keichousaurus hui fossil from Guizhou Xingyi ,China isolated on white background
The head and neck of a aquatic dinosaur isolated on white with a clipping path
Natural material, such as a large stone with the imprint of a prehistoric creature, allowing the study of natural diversity during the dinosaur period and earlie
34 million year old fossil plant parts.
nothosaurus  fossil on white, isolated
Micrograph of ancient paleozoic Rugosa coral, also known as horn coral, fossils from the Pennsylvanian period. Viewed in a rock matrix as a thin section. Cross sections of individual corals are about 1 cm in diameter. Collected near Blue Mountain in the Peloncillo Mountian Range, New Mexico, USA.
Mosasaur Sea Lizard Fossil on black background.
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
nature
Ammonite Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco
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