Abstract
Chesapeake Bay impact structure is one of the largest impact structures on the Earth. It is buried beneath the lower part of the Chesapeake Bay and probably is one of the best-preserved marine impact craters. The structure, discovered only in 1983 during oil exploration when tektites and shocked quartz have been found, is 35.3 Myr old and approximately 85 km in diameter. However, it has been suggested that the large diameter is partly a result of the specific target properties—rheologic contrast between unconsolidated sediments and crystalline basement on the continental shelf—and consequent resurge and sliding processes during the impact formation and estimate on the transient crater diameter was only about 28 km (Bartosova and Koeberl 2011).
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