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A dinosaur fossil at Petrified Forest National Park Visitor Center, AZ, USA
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.
Fossilized remains of ancient marine life creating an interesting natural pattern on a rock surface
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).
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.
Fossilized fish
Detail of a fossil Ichthyosaurus.
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
fossil trilobite imprinted in the sediment
Magnified close up of shale with multiple trilobite fossils.
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
Trilobites fossil from Middle Ordovician Era. Selective focus
Fossil Fern inside carbon rocks. The image was captured in the Swiss Alps.
Beautiful fossil of some sort of dinosaur reptile from Madagascar, isolated on a white background
Fossilised Fish
Keichousaurus hui sauropterygian fossil from China
Abruzzo, Italy: fossil shells enclosed in the sedimentary rocks of a mountain river in the Gran Sasso Monti della Laga National Park, sign that the mountain range was once submerged
Petrified fossil crinoids (sea lilies, featherstars) in stone
Marine mammal bone (Cetacea) and other fossils outcrop on the beach at Capitola City Beach, California, USA.
The fossil of a fish in grey slated stone
Bivalvia Fossils inside a large Ammonit. Gastropods from the jurassic period.
Old stones background. imprint of an ancient ammonite from the Mesozoic era.
Fossils of marine life.Ammonite fossils
Complete fish fossil embedded in lime stone
The island of Oahu, in the state of Hawaii, from old camera film in 1987.
Photo of Dinosauro Antonio, Tethyshadros insularis
Fossil Devonian brachiopod isolated on white background.
Free Images: "bestof:Discoscaphitesgulosus.jpg en Discoscaphites gulosus fossil on display at the San Diego County Fair California USA own Stickpen 2010-06-16 public domain"
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