Corossol crater

Corossol Structure
Corossol Crater
Corossol Structure

Location of the Corossol structure in Quebec

Impact crater/structure
Confidence possible[1]
Diameter 4.1 kilometres (3 mi)[1]
Age post-Middle Ordovician and pre-Quaternary[1]
Exposed Yes, seabottom at water depths from 40–208 meters (131–682 ft)[1]
Drilled No
Location
Location Gulf of Saint Lawrence, Côte-Nord, Quebec
Coordinates 50°03′00″N 66°23′00″W / 50.05°N 66.383333°WCoordinates: 50°03′00″N 66°23′00″W / 50.05°N 66.383333°W
Country Canada
Province Québec
Municipality Sept-Îles

The Corossol structure is argued to be a deeply eroded impact structure located in the Gulf of Saint Lawrence near Sept-Îles, Quebec (Canada). It lies underwater at a depth of 40–208 meters (131–682 ft), it was created as a result of the impact of a meteoroid of about 300 meters (980 ft) in diameter. Detailed analysis of high-resolution Multibeam echosounder and seismic reflection data indicates that rivers deeply eroded the Corossol structure and Paleozoic sedimentary rocks comprising the surrounding sea bottom during periods of pre-Quaternary sea-level low stands and continental ice sheets further eroded it during the Quaternary. Stratigraphic and geomorphic relationships indicate that this impact structure formed sometime after Middle Ordovician, about 470 million years ago, and before the first continental glaciations of North America at the beginning of the Quaternary, about 2.6 million years ago.[1]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Lajeunesse, P., G. St-Onge, J. Locat, M. J. Duchesne, M. D. Higgins, Sanfaçon, and J. Ortiz, 2013, The Corossol structure: A possible impact crater on the seafloor of the northwestern Gulf of St. Lawrence, Eastern Canada. Meteoritics & Planetary Science. vol. 48, no. 12, pp. 2542–2558.

External links