Blake Nose
Blake Nose is a submerged peninsula extending northeast from the North American continental shelf, located about 280 miles (460 km) east of Daytona Beach, Florida.
A salient of the Blake Plateau, Blake Nose is a "gentle ramp" of the continental shelf, which was built up during the Eocene, and consists of "carbonate ooze and chalk."[1] That layer is on top of an older Albian sequence of green claystone and shale, and below that is the K-T boundary.[2] The discovery of the K-T boundary here is direct evidence of the "mass wasting" of the Cretaceous–Paleogene extinction event caused by the Chicxulub impact event.[3] Together with other, complementary evidence collected by the Geological Society of America, the phenomena at Blake Nose show that the Mesozoic or 'age of dinosaurs' ended with a sudden, catastrophic extinction event caused by an extraterrestrial object.[4]
It is about 40 mi (64 km) wide at the base of the peninsula and about 50 mi (80 km) long.
Blake Nose appears as a distinctive "spur" in online satellite maps which show the Atlantic continental shelf of Florida.
References
[edit]- ↑ Norris, R.D. (1996). Proceedings of the Ocean Drilling Program, Initial report, Part A, Volume 171. Ocean Drilling Program. p. 351. Retrieved August 21, 2025.
- ↑ Mix, Alan; Abrantes, Fatima (2012). Reconstructing Ocean History: A Window Into the Future. Springer USA. ISBN 9781461541974. Retrieved August 21, 2025.
- ↑ Norris, R.D.; Firth, J.V. (2002). Mass wasting of Atlantic continental margins following the Chicxulub impact event, in Catastrophic Events and Mass Extinctions: Impacts and Beyond. Geological Society of America. pp. 79–95. Retrieved August 21, 2025.
- ↑ Koeberl, Christian; MacLeod, Kenneth G. (2002). Catastrophic Events and Mass Extinctions: Impacts and Beyond. Geological Society of America. Retrieved August 21, 2025.
30°00′N 76°30′W / 30°N 76.5°W
 | This article about a specific oceanic location or ocean current is a stub. You can help Wikipedia by adding missing information. |