http://www.virginiaplaces.org/geology/bolide.html Web2. Seismic profile of Chesapeake Bay impact crater's inner basin. 3. Section B-B ' and seismic profiles from York River (C-C ') and Chesapeake Bay (D-D ') 4. Lithostratigraphic cross section: Jamestown to Fort Monroe to Rescue, Virginia. 5. Stratigraphic columns of four continuous coreholes. 6.
Chesapeake Bay impact crater - Wikipedia
WebThe crater is now approximately 200 km southeast of Washington, D.C., and is buried 300-500 meters beneath the southern part of Chesapeake Bay and the peninsulas of southeastern Virginia (fig. 1). The entire bolide event, from initial impact to the termination of breccia deposition, lasted only a few hours or days. WebOct 1, 2008 · The biotic effects of large bolide impacts: size versus time and place - Volume 7 Issue 3-4. ... Siberia (continental arctic desert) provide much less damaging scenarios. However the c. 90 km Chesapeake Bay crater, Eastern USA (also c. 35 Ma) marks a far more sensitive (Chicxulub-like) site but it also proved relatively benign. Here … twitter creamcrew
The Chesapeake Bay Bolide Impact: A New View of …
WebThe bolide carved a roughly circular crater twice the size of the state of Rhode Island (~6400 km 2), and nearly as deep as the Grand Canyon (1.3 km deep). The excavation truncated all existing ground water aquifers in the impact area by gouging ~4300 km 3 of rock from the upper lithosphere, including Proterozoic and Paleozoic crystalline ... Webconcentrations of salt. The result was an inland bulge around the lower Chesapeake Bay, centered around Cape Charles on the Eastern Shore. In the 1940s, the USGS sent geologist Cederstrom to hunt for water to support the region's military buildup before World War II, given new urgency by lingering drought that had depleted surface water. The Chesapeake Bay impact crater is a buried impact crater, located beneath the mouth of Chesapeake Bay, United States. It was formed by a bolide that struck the eastern shore of North America about 35.5 ± 0.3 million years ago, in the late Eocene epoch. It is one of the best-preserved "wet-target" impact craters … See more During the warm late Eocene, sea levels were high, and the tidewater region of Virginia lay in the coastal shallows. The shore of eastern North America, about where Richmond, Virginia is today, was covered with thick See more The continual slumping of the rubble within the crater has affected the flow of the rivers and shaped the Chesapeake Bay. The impact crater created a long-lasting topographic depression which helped predetermine the course of local rivers and the eventual … See more • Poag, C. Wiley. Chesapeake Invader: Discovering America's Giant Meteorite Crater. Princeton, NJ: Princeton University Press, 1999. ISBN 0-691-00919-8 • Post-impact Effects of the Eocene Chesapeake Bay Impact, Lower York-James Peninsula, Virginia, 31st … See more Until 1983 there was no evidence of a large impact crater buried beneath the lower part of the Chesapeake Bay and its surrounding peninsulas. The first hint was a 8-inch-thick (20 cm) layer of ejecta found in a drilling core taken off Atlantic City, New Jersey, … See more • Toms Canyon structure probable impact crater 322 km (200 mi) to the northeast. • Popigai impact structure of similar age • Grande Coupure • Carolina bays See more • 'Isostatic Rebound and its effects on the Chesapeake Bay' • A brief introduction to the Chesapeake Bay Impact Crater. • USGS, 'Investigating the Chesapeake Bay Impact Crater.' See more twitter creamkafe