The Laurentian Fan or Laurentian Abyss is an underwater depression off the eastern coast of Canada in the Atlantic Ocean. [1]
Location and origin
Not a trench, but more of an "underwater valley", it is estimated to be at most ~19,685 feet (3.7 miles; 6.0 km) in depth. The Laurentian Fan is a product of glaciation and water currents from the Gulf of Saint Lawrence. [2] It is part of the Laurentian cone region, bound by the Laurentian Channel and the Sohm Abyssal Plain. The approximate coordinates are 43°40′N 56°10′W / 43.667°N 56.167°W.
Ecosystem
Towards the end of the 1980s, it was discovered unexpectedly that the fan is the site of hydrothermal vents with their own ecosystems functioning in the absence of sunlight. These supported organisms such as vesicomyid and thyasirid clams, as well as marine gastropods and other epifauna similar to those found in hydrothermal and cold seep environments elsewhere. [3]
Popular culture
The Laurentian Fan plays a geographic role in the plotline of the 1990 film The Hunt for Red October. It also appears at the end of the 2007 film Transformers, with the United States government depicted dumping the remains of Megatron, the other defeated Decepticons, and the deceased Autobot Jazz into the fan, in hopes that the crushing depths and low temperature will destroy the remains.[ citation needed] The fan later reappears in the film's 2009 sequel Transformers: Revenge of the Fallen, where the Decepticons revive Megatron.[ citation needed]
See also
References
- Notes
- ^ Piper, D.J.W.; Stow, D.A.V.; Normark, W.R. (1985). "Laurentian Fan, Atlantic Ocean". In Bouma, A.H.; Normark, W.R.; Barnes, N.E. (eds.). Submarine Fans and Related Turbidite Systems. Frontiers in Sedimentary Geology. New York: Springer. pp. 137–142. doi: 10.1007/978-1-4612-5114-9_20. ISBN 9781461295709. Retrieved September 15, 2022.
- ^ Information gathered via a phone interview with Dr. Norm Catto of Memorial University - August 15, 2008
- ^ Mayer, L.A.; Shor, A.N.; Hughes Clarke, J.; Piper, D.J.W. (1988). "Dense biological communities at 3850m on the Laurentian Fan and their relationship to the deposits of the 1929 Grand Banks earthquake". Deep Sea Research Part A. Oceanographic Research Papers. 35 (8). Elsevier: 1235–1246. doi: 10.1016/0198-0149(88)90079-9. ISSN 0198-0149. Retrieved September 15, 2022 – via Academia.edu.
External links
- "Laurentian Fan". Geographical Names Data Base. Natural Resources Canada. Retrieved 2021-06-05.
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