At a location in Tanis, North Dakota, University of Kansas PhD student Robert DePalma found a “treasure trove” of fossilized freshwater fish, trees, and marine ammonites that appear to be from the day an asteroid hit the Earth.
The impact created the Chicxulub crater and triggered a tsunami that killed a mix of land and sea organisms that were found together in the area. David Burnham, co-author of a paper based on research from the discovery, said, “The sedimentation happened so quickly everything is preserved in three dimensions—they’re not crushed.”
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