Contact: Robert Monroe
University of California - San Diego
Caption: An asteroid impact 65.5 million years ago left a clear band between light colored Cretaceous sediment (left) and dark-colored, Paleocene sediment (right) recovered from the seafloor off South America. The abrupt shift in sediment color that reflects the instantaneous drop in ocean biological productivity, fossil numbers, and species.
Credit: Scripps Institution of Oceanography, UC San Diego
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