| Abstract: | Seismic profiles, drill core samples, and gravity data suggest that a complex impact crater ???35.5 million years old and 90 kilometers in diameter is buried beneath the lower Chesapeake Bay. The breccia that fills the structure contains evidence of shock metamorphism, including impact melt breccias and multiple sets of planar deformation features (shock lamellae) in quartz and feldspar. The age of the crater and the composition of some breccia clasts are consistent with the Chesapeake Bay impact structure being the source of the North American tektites. |
| Genre: | Article |
| ProdID: | 70018511 |
| Citation Author: | Koeberl, C.; Poag, C. W.; Reimold, W. U.; Brandt, D. |
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| Citation End Page: | 1266 |
| Citation Issue: | 5253 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Impact origin of the Chesapeake Bay structure and the source of the North American tektites; 1996; Article; Journal; Science; Koeberl, C.; Poag, C. W.; Reimold, W. U.; Brandt, D. |
| Citation Start Page: | 1263 |
| Citation Volume: | 271 |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | Impact origin of the Chesapeake Bay structure and the source of the North American tektites; 1996; Article; Journal; Science; Koeberl, C.; Poag, C. W.; Reimold, W. U.; Brandt, D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1996 00:00 -0600 |
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