The Sedimentary Record of Meteorite Impacts

Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA
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Published:January 01, 2007
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CiteCitation
J. Wright Horton, Jr., Gregory S. Gohn, David S. Powars, Lucy E. Edwards, 2007. "Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA", The Sedimentary Record of Meteorite Impacts, Kevin R. Evans, J. Wright Horton, Jr., David T. King, Jr., Jared R. Morrow
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The late Eocene Chesapeake Bay impact structure, located on the Atlantic margin of Virginia, may be Earth's best-preserved large impact structure formed in a shallow marine, siliciclastic, continental-shelf environment. It has the form of an inverted sombrero in which a central crater ∼40 km in diameter is surrounded by a shallower brim, the annular trough, that extends the diameter to ∼85 km. The annular trough is interpreted to have formed largely by the collapse and mobilization of weak sediments. Crystalline-clast suevite, found only in the central crater, contains clasts and blocks of shocked gneiss that likely were derived from the...
- acoustical waves
- Atlantic Ocean
- boreholes
- breccia
- Cenozoic
- Chesapeake Bay
- Chesapeake Bay impact structure
- cores
- ejecta
- Eocene
- erosion
- fluidization
- fragmentation
- impact breccia
- impact craters
- impact features
- impact melts
- impactites
- impacts
- liquefaction
- marine environment
- melts
- metamorphic rocks
- metamorphism
- Paleogene
- resurgence
- sedimentation
- shelf environment
- shock metamorphism
- suevite
- Tertiary
- United States
- upper Eocene
- Virginia
- Chickahominy Formation
- Exmore Beds
- annular trough