Impact effects and regional tectonic insights: Backstripping the Chesapeake Bay impact structure
The Chesapeake Bay impact structure is a ca. 35.4 Ma crater located on the eastern seaboard of North America. Deposition returned to normal shortly after impact, resulting in a unique record of both impact-related and subsequent passive margin sedimentation. We use backstripping to show that the impact strongly affected sedimentation for 7 m.y. through impact-derived crustal-scale tectonics, dominated by the effects of sediment compaction and the introduction and subsequent removal of a negative thermal anomaly instead of the expected positive thermal anomaly. After this, the area was dominated by passive margin thermal subsidence overprinted by periods of regional-scale vertical tectonic events, on the order of tens of meters. Loading due to prograding sediment bodies may have generated these events.
Citation Information
Publication Year | 2008 |
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Title | Impact effects and regional tectonic insights: Backstripping the Chesapeake Bay impact structure |
DOI | 10.1130/G24408A.1 |
Authors | T. Hayden, M. Kominz, David S. Powars, Lucy E. Edwards, K.G. Miller, J.V. Browning, A.A. Kulpecz |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Geology |
Index ID | 70031907 |
Record Source | USGS Publications Warehouse |
USGS Organization | Eastern Geology and Paleoclimate Science Center; Florence Bascom Geoscience Center |