This is a top-down, close-up shot of two fossil specimens displayed on a black fabric surface, likely taken at the Chongqing Museum of Natural Resources Science Popularization in China. The specimens are held in place by thin metal pins. A white circular label with the number "3" in black is visible in the lower center of the frame, suggesting these are part of a larger exhibit.The fossil on the left is partially embedded in a light gray matrix rock. The preserved portion shows a ribbed, roughly semicircular or fan-shaped shell. The ribs radiate outwards from a hinge area, and the shell exhibits a slightly convex curvature. The fossil appears to be mineralized, with a grayish-brown coloration.The fossil on the right is a more complete and isolated specimen, also displaying a ribbed, semicircular or fan-shaped shell. The ribs are clearly defined and extend across the surface of the shell. This fossil also shows a slight convexity and a grayish coloration.Based on their morphology, these fossils are brachiopods. Brachiopods are marine animals with two shells (valves) that are bilaterally symmetrical perpendicular to the hinge line, unlike the shells of bivalves (like clams) which are symmetrical along the hinge line. The ribbed pattern is a common feature in many brachiopod species.These fossils are scientifically valuable as they represent ancient marine life and provide insights into past ecosystems and evolutionary history. They are used by paleontologists to study the biodiversity of prehistoric oceans, understand geological time scales, and reconstruct ancient environments. In a museum setting like the Chongqing Museum of Natural Resources Science Popularization, they serve an educational purpose, allowing the public to learn about fossils and the history of life on Earth.
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