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fossil trilobite imprinted in the sediment
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
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.
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.
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.
Detail of a fossil Ichthyosaurus.
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.
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.
Ancient fish fossils are on a rock
Trilobites
Magnified close up of shale with multiple trilobite fossils.
Fossils of marine life.Ammonite fossils
Trilobites fossil from Middle Ordovician Era. Selective focus
Primitive fish fossil
isolated on black.
Ammonite and Orthoceras Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco
Block of brown and white fossil shells background
Adventures in the Southwest USA, paleontologist at work
Ammonite fossil imprint on prehistoric rocks
fossil of a trilobite. lived during time of Early Cambrian throughout the lower Paleozoic, during the Devonian til the end of the Permian See also my other Fossils and Mineral/ Crystal images:
The fossil of a fish in grey slated stone
Ammomite (Ammomoideae) fossil imprint on a limestone. The image was captured in the canton of schaffhausen during springtime.
Keichousaurus hui sauropterygian fossil from China
Fossils in the rock in the Sierra de Francia, Salamanca
trilobite fossil
Fossilised Fish
Dinosaur fossils on sand stone background- detail.
Trace of ammonite fossil on the beach at Lyme Regis, Dorset, uK
Free Images: "bestof:Fossil Thelodus Woodward.png en Restoration of the agnathanThelodus scoticus Loganellia scotica The body is twisted in the middle portion in order to show the"
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