Seismic expression of the Chesapeake Bay impact crater: Structural and morphologic refinements based on new seismic data
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Abstract
This work refines previous interpretations of the structure and morphology of the Chesapeake Bay impact crater on the basis of more than 1,200 km of multichannel and single-channel seismic reflection profiles collected in the bay and on the adjacent continental shelf. The outer rim, formed in sedimentary rocks, is irregularly circular, with an average diameter of ~85 km. A 20–25-km-wide annular trough separates the outer rim from an ovate, crystalline peak ring of ~200 m of maximum relief. The inner basin is 35–40 km in diameter, and at least 1.26 km deep. A crystalline(?) central peak, approximately 1 km high, is faintly imaged on three profiles, and also is indicated by a small positive Bouguer gravity anomaly. These features classify the crater as a complex peak-ring/central peak crater. Chesapeake Bay Crater is most comparable to the Ries and Popigai Craters on Earth; to protobasins on Mars, Mercury, and the Moon; and to type D craters on Venus.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Seismic expression of the Chesapeake Bay impact crater: Structural and morphologic refinements based on new seismic data |
| Series title | GSA Special Papers |
| Series number | 339 |
| DOI | 10.1130/0-8137-2339-6.149 |
| Year Published | 1999 |
| Language | English |
| Publisher | Geological Society of America |
| Contributing office(s) | Woods Hole Coastal and Marine Science Center |
| Description | 16 p. |
| Larger Work Title | Large meteorite impacts and planetary evolution; II |
| First page | 149 |
| Last page | 164 |
| Country | United States |
| Other Geospatial | Chesapeake Bay Crater |
| Google Analytic Metrics | Metrics page |