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The Chesapeake Bay impact structure

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Powars, D.S., Edwards, L.E., Gohn, G.S., and Horton, J.W., Jr., 2015, The Chesapeake Bay impact structure: U.S. Geological Survey Fact Sheet 2015–3071, 2 p., http://dx.doi.org/10.3133/fs20153071.

Summary

About 35 million years ago, during late Eocene time, a 2-mile-wide asteroid or comet smashed into Earth in what is now the lower Chesapeake Bay in Virginia. The oceanic impact vaporized, melted, fractured, and (or) displaced the target rocks and sediments and sent billions of tons of water, sediments, and rocks into the air. Glassy particles of solidified melt rock rained down as far away as Texas and the Caribbean. Models suggest that even up to 50 miles away the velocity of the intensely hot air blast was greater than 1,500 miles per hour, and ground shaking was equivalent to an earthquake greater than magnitude 8.0 on the Richter scale. Large tsunamis affected most of the North Atlantic basin. The Chesapeake Bay impact structure [...]

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Harvested on Mon Nov 30 04:17:24 MST 2015 from MODS XML Service

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Type Scheme Key
local-index unknown fs20153071
local-pk unknown 70158701
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.3133/fs20153071
series unknown Fact Sheet

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citationTypeReport
journalFact Sheet
languageEnglish
parts
typePublication Place
valueReston, VA

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