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A 'trilobite Pompeii': Perfectly preserved fossils of ancient sea critters found buried in volcanic ashMore than 22,000 species of trilobite have been named. This is largely because the trilobite exoskeleton was made of a mineral called calcite, which fossilized very easily. However, fossils ...
Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California 90095, United States ...
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