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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.
Dapalis Macrurus fish fossil from Aix-en-Provence, France
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
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.
Microraptor gui fossil, Early Cretaceous.
Trilobites fossil from Middle Ordovician Era. Selective focus
Ammomite (Ammomoideae) fossil imprint on a limestone. The image was captured in the canton of schaffhausen during springtime.
In the petrified bed of a river in San Juan Raya, within the Tehuacan-Cuicatlan Biosphere Reserve, state of Puebla, the petrified footprints of dinosaurs that lived here in the Jurassic were found, specifically these of carnivorous theropods. They are marked with river stones to be able to identify them.
Primitive fish fossil
Dinosaur fossils on sand stone background- detail.
Ammonite and Orthoceras Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco
Beautiful fossil of some sort of dinosaur reptile from Madagascar, isolated on a white background
Fish skeleton on black background
Detail of a fossil Ichthyosaurus.
Ammonite inside a large rock. The ammonites where living between 409 and 65 million years ago (Mya).
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.
Ancient fish fossils are on a rock
close up on fossil fish in the rock
Ancient fish fossil in stone
Keichousaurus hui sauropterygian fossil from China
Detail of a fossil Ichthyosaurus.
Fossilized fish
The fossil of a fish in grey slated stone
Trace of ammonite fossil on the beach at Lyme Regis, Dorset, uK
isolated on black.
Fossil Fern inside carbon rocks. The image was captured in the Swiss Alps.
A very old fossil of a prehistoric fish on a stone
Fossilized ammonite in limestone on a sidewalk, weathered by time.
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