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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 in the world.
Flynn Creek crater, is an impact crater situated in Jackson County, approximately 8 km south of Gainesboro, Tennessee, USA. It was formed approximately 360 million years ago as a shallow, saucer-shaped crater, 3.8 km (2.4 mi) in diameter and about 150 m deep. A large central hill, highly deformed rim strata, and a breccia lens 40 m (130 ft) in thickness were produced during formation. Over 2 km2 of flat lying Middle and Upper Paleozoic limestone and dolomite were brecciated and mixed to a depth of 200 m (660 ft), and at least half of the breccia was ejected from the crater. The remaining breccia contains fragments ranging in size from small grains to megabreccia blocks 100 m (330 ft) in length. Undisturbed strata lie 100 m below the original crater floor.
The Popigai impact structure is the eroded remnant of an impact crater in northern Siberia, Russia. It is tied with the Manicouagan structure as the fourth largest verified impact structure on Earth. A large bolide impact created the 100-kilometre (62 mi) diameter crater approximately 35 million years ago during the late Eocene epoch. It might be linked to the Eocene–Oligocene extinction event.
References
- 1 2 "Craters are evidence of ancient meteorite strikes". The University Record. September 12, 1994. Archived from the original on June 6, 2007. Retrieved May 26, 2006.
- ↑ "Calvin". Earth Impact Database . Planetary and Space Science Centre University of New Brunswick Fredericton . Retrieved 2009-08-12.
41°50′N85°57′W / 41.83°N 85.95°W
