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fossil trilobite imprinted in the sediment
Ammonite fossils in limestone. The ammonites where living between 409 and 65 million years ago (Mya). The fossils where found in the canton of Aargau (Switzerland).
Group of fossilized ammonites on the stone surface, archeology and paleontology abstract background
Snail shells of various colors
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.
Fossil of crinoid Encrinus liliiformus 200 million years ago
close up on fossil fish in the rock
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
trilobite fossil texture as nice natural background
Sea Urchin spine fossil.  The close-up image shows a  sea urchin fossil from the jurassic period inside a limestone.
fossil trilobite imprint in the sediment Backlit by lamp.
Marine life fossils.
isolated rock formation including lots of ammonite fossils
Devonian microfossils in limestone matrix include circular and cylindrical crinoids, fan-shaped brachiopod (shell) fragments, speckled bryozoan fragments. Rock is about 1 1/2\
Shell sediment abstract close up
Magnified close up of shale with multiple trilobite fossils.
A large assemblage of relatively complete trilobites from the early Ordovician era.
Ammonite and Sea Urchin Fossils found in lime stone sediments in the jurrassic part of the swiss canton of Aargau.
Close up isolated image of an ammonite fossil
Shell series: shells in various colors
four Fossils Specimens  : Practical Specimens for Study of Earth Science / Isolated white
Live sand dollars on the sea bottom
shell  fossil  in the stone on white, isolated
chinese medicine oysters shell on black background
full frame background showing lots of trilobite fossils
Sea Urchin Fossils found in the canton of aargau.  The close-up image shows several urcin fossils from  the jurassic  period.
Trilobite reconstructed
Fossils of marine life.Ammonite fossils
Petrified fossil starfishes and trilobites in stone
Devonian cronoid fossils in limestone matrix. Largest is about 1/4\
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