Backyard bolides: finding a buried impact crater.

Details Backyard bolides: finding a buried impact crater. Backyard bolides: finding a buried impact crater.

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998plr....18....6p&link_type=abstract

Planet. Rep., Vol. 18, No. 5, p. 6 - 8

Physics

Earth History: Impact Craters

Scientific paper

The author reports the scientific activities that led to his discovery of a huge submerged impact crater in Chesapeake Bay, some 140 km east of Atlantic City, New Jersey. This crater, buried under 350 m of sediment is 80 km wide and almost 1 km deep. Microfossil evidence shows that the crater is approximately 35 million years old. The author futher identified 14 small secondary craters with diamters of 0.4 to 0.5 km diameter within 60 km of the primary crater. These were caused by the impact of huge blocks of material ejected by the primary impact event. In addition, the author identified an intermediate-size primary crater (19 km diameter) in Toms Canyon, some 300 km from the Chesapeake crater and, again from microfossil evidence, identical in age.

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