Orphan Knoll

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Orphan Knoll
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Orphan Knoll is an undersea peak, horst [1] and continental fragment located in the Atlantic Ocean off the northeast coast of Newfoundland, with mounds on it rising up to 1,800 meters from the surface. It was above sea level in the Middle Jurassic Period, and was left behind when Europe and Newfoundland separated during the formation of the North Atlantic, thus giving the peak its name. [2] Due to its isolation, it is a hotspot for marine life and is home to corals, sponges, and endemics. [3]

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Frankfurt Seamount, also known as Frankfurt Knoll, is an undersea mountain in the North Atlantic Ocean, located about 480 km (300 mi) south of Cape Race on the North American continental rise. Its summit is more than 2,000 m (6,600 ft) below sea level and rises to a height of over 1,000 m (3,300 ft). With an areal extent of 320 km2 (120 sq mi), Frankfurt Seamount is larger than the New Brunswick city of Saint John.

Birma Seamount, also known as Birma Knoll, is a undersea mountain in the North Atlantic Ocean, located about 650 km (400 mi) south of Cape Race in Canadian waters off Atlantic Canada. It has a height of over 1,800 m (5,900 ft), making Birma the tallest of the Fogo Seamounts. Its areal extent of 733 km2 (283 sq mi) is smaller than the Albertan city of Calgary. To the west, Birma Seamount is bounded by Algerine Seamount.

Carpathia Seamount, also known as Carpathia Knoll, is an undersea mountain in the North Atlantic Ocean, located about 600 km (370 mi) southeast of Cape Race in Canadian waters off Atlantic Canada. It rises to a height of over 1,000 m (3,300 ft) and has an areal extent of 550 km2 (210 sq mi), making it slightly larger than the Ontarian city of Kingston. Carpathia Seamount and Mount Temple Seamount about 90 km (56 mi) to the west are among the closest seamounts to the RMS Titanic wreck.

Mackay-Bennett Seamount, also known as Mackay-Bennett Knoll, is an undersea mountain in the North Atlantic Ocean, located about 680 km (420 mi) southeast of Cape Race in Canadian waters off Atlantic Canada. It rises to a height of over 1,000 m (3,300 ft) and has an areal extent of 500 km2 (190 sq mi), making it slightly smaller than Carpathia Seamount to the southwest.

Mount Temple Seamount, also known as Mount Temple Knoll, is an undersea mountain in the North Atlantic Ocean, located about 600 km (370 mi) southeast of Cape Race in Canadian waters off Atlantic Canada. It rises to a height of over 1,000 m (3,300 ft) and has an areal extent of 475 km2 (183 sq mi), making it larger than Quebec City and the Manitoban city of Winnipeg. Mount Temple Seamount and Carpathia Seamount about 90 km (56 mi) to the east are among the closest seamounts to the RMS Titanic wreck.

In marine geology, a knoll is defined as a rounded underwater hill, not exceeding 1000 meters in height. Any rounded underwater features exceeding that height are referred to as seamounts. They are believed to cover around 16.3% of the world's seafloor.

References

  1. Meredyk, Shawn P.; Edinger, Evan; Piper, David J. W.; Huvenne, Veerle A. I.; Hoy, Shannon; Ruffman, Alan (2020). "Enigmatic Deep-Water Mounds on the Orphan Knoll, Labrador Sea". Frontiers in Marine Science. 6. doi: 10.3389/fmars.2019.00744 . hdl: 1983/7fd00252-ffd7-481b-9e4d-52a9b03911b4 . ISSN   2296-7745.
  2. Government of Canada, Fisheries and Oceans Canada (January 16, 2019). "Advisory Committee on Undersea Feature Names" . Retrieved February 10, 2022.
  3. "Ecologically or Biologically Significant Areas (EBSAs): Orphan Knoll". The Clearing-House Mechanism of the Convention on Biological Diversity (CHM). June 12, 2015. Retrieved February 10, 2022.