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fossil trilobite imprinted in the sediment
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
Ammomite (Ammomoideae) fossil imprint on a limestone. The image was captured in the canton of schaffhausen during springtime.
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.
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.
Detail of a fossil Ichthyosaurus.
Ancient fish fossil in stone
Microraptor gui fossil, Early Cretaceous.
Magnified close up of shale with multiple trilobite fossils.
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
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.
Block of brown and white fossil shells background
Trilobites fossil from Middle Ordovician Era. Selective focus
Ammonite and Orthoceras Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco
Dinosaur fossils on sand stone background- detail.
Primitive fish fossil
Ancient fish fossils are on a rock
Adventures in the Southwest USA, paleontologist at work
Keichousaurus hui sauropterygian fossil from China
Fossil remains of a lizard on a stone.
close up on Trilobite fossil isolated on white background
Ammonite inside a large rock. The ammonites where living between 409 and 65 million years ago (Mya).
The fossil of a fish in grey slated stone
Fossils in the rock in the Sierra de Francia, Salamanca
isolated on black.
Trace of ammonite fossil on the beach at Lyme Regis, Dorset, uK
Beautiful fossil of some sort of dinosaur reptile from Madagascar, isolated on a white background
Ancient petroglyph. Fremont Culture, Utah.
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