Discovery
Until 1983, no one suspected the existence of a large impact crater buried beneath the lower part of the Chesapeake Bay and its surrounding peninsulas. The first hint was a 20 cm (8 in) thick layer of ejecta that turned up in a drilling core taken off Atlantic City, New Jersey, far to the north. The layer contained the fused glass beads called tektites and shocked quartz grains that are unmistakable signs of a bolide impact.
In 1993, data from oil exploration revealed the extent of the crater.
Read more about this topic: Chesapeake Bay Impact Crater
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