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American Indian Arrowhead/Spear Point Artifact in Palm of Hand
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.
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
A dinosaur fossil at Petrified Forest National Park Visitor Center, AZ, USA
An arid mountain landscape with an abandoned structure
Keichousaurus hui sauropterygian fossil from China
This photograph was taken during the Archaeological Excavation of Asıklı Village, which is located in Aksaray, Turkey, whose history dates back to 10000 BC.
Ancient skeleton corpse found underground - Ban Chiang , Thailand
Fossils of marine life.Ammonite fossils
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.
Part of a dromedary skeleton jaw in the Moroccan desert on a sunny morning.
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.
Tyrannosaurus rex skeleton, 67 million years ago, USA.
Shoulder blade of a African elephant laying on the ground on the savannah in the Okavango Delta in Botswana
Isolated on white.
Fossilised Fish
Eoraptor skull on white, isolated
Bivalvia Fossils inside a large Ammonit. Gastropods from the jurassic period.
Ancient fish fossils are on a rock
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.
Prehistoric fish fossil impint in stone isolated on a white background
Marine mammal bone (Cetacea) and other fossils outcrop on the beach at Capitola City Beach, California, USA.
Professional Archaeological excavations, archaeologists work, dig up an ancient clay artifact with special tools in soil
Natural ecology, stone, rust, texture, background, abstract, plain stone, rock, building material, shape, solid, marble, granite, sea stone, wall, floor, stone wall, color, nature, simplicity
Sea Urchin spine fossil.  The close-up image shows a  sea urchin fossil from the jurassic period inside a limestone.
Dinosaur fossil simulator excavation in sand for education and learning
Limestone is chemically a calcium carbonate formed by accumulation of biogenic remains or precipitation from chemical solution. This limestone was probably formed ina lake environment when changes in the depositional condition resulted in formation of a carbonate ooze at the bottom of the lake that was later converted into limestone layers.
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