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SKU:S508
Rastellum Carinatum Oyster Shell Cretaceous Period Fossil Specimen
Rastellum Carinatum Oyster Shell Cretaceous Period Fossil Specimen
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R100.00 ZAR
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R100.00 ZAR
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Wings of the Cretaceous Sea: Premium Rastellum Fossil
Discover this stunning 69mm x 41mm Rastellum carinatum fossil from Madagascar's Mahajanga Province, a testament to life in Earth's ancient oceans. Rastellum was a specialized oyster that developed an unusual, flattened, fan-like shell with prominent ribs, adapted for life on soft seafloor sediments during the Cretaceous Period. These filter-feeding bivalves populated tropical and subtropical waters between 100 and 66 million years ago, living in dense colonies on the ocean floor. The genus disappeared at the end of the Cretaceous when the asteroid impact that killed the dinosaurs also triggered ocean acidification, temperature changes, and food chain collapse that marine organisms couldn't survive. This fossil formed as the oyster's body decomposed while buried in fine sediments, allowing minerals to slowly crystallize within the shell's structure, preserving every intricate detail.
These fossils provide invaluable evidence of how marine ecosystems responded to catastrophic environmental change and help scientists understand extinction vulnerability in modern oceans.
Secure this exceptional window into prehistoric marine life for your collection now!
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