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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.
Fossils from the Devonian period are embedded into the limestone at the Falls of the Ohio State Park in Indiana
Close up of a multitude of fossil crinoids
Polished texture of natural gem stone sea fossil
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
Rock - Object, Stone - Object, Stone Material, Blackboard, Plate
Scenic canyon in Deyang, China
Grey and brown  rocks background.\nCreating an unusual shape.
Unusual spherical shape of stones in the Kazakh steppe Mangistau, valley of balls in nature Torysh
Many Bivalvia Fossils inside a limestone rock. Gastropods from the jurassic period captured as close-up during summer season.
Brown stone on sand background, texture
Closeup of Rough Stone Surface with Fallen Leaves in Autumn
Abandoned stone in industrial areas, industrialism.
Rudists embeded in sandstones, cross sections.\nCretaceous marine fossis near Barcelona.
Close up shot of sea shells fossil trapped in sandstone.
Rocky beach with different rocks and sizes. Texture. Background. Abstract
Soft sediment deformation, due to movement of sediment after deposition, in the mudstones of the Blackhawk formation of the Book cliffs, Utah, USA
An Ammonite inside a limestone on an agricultural field. The ammonites where living between 409 and 65 million years ago (Mya).
Weird sandstone formations created by erosion at Ah-Shi-Sle-Pah Wilderness Study Area in San Juan County near the city of Farmington, New Mexico.
Fossil
Shattered rock texture
Close-up of Monotis Richmondiana Shell Fossils in Greywacke Rock from the Triassic Era.
Stone formations
Close up of honeycomb weathering in sandstone near Step House, Mesa Verde National Park, Colorado, USA.
Explore Santa Maria island, landmark with geological interest, rocks with fossils.
A large rock sits in a field of fallen leaves.
Petrified leaf, Paleontology background from Spitsbergen rocks (Svalbard)
Very crumbly sandstone cliff in Wadi Bani Awf, Oman. Nice for background.
Ammonite (Ammonoidea), stone lying on the grass
Many Bivalvia Fossils inside a limestone rock. Gastropods from the jurassic period captured as close-up during summer season.
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