The West Scotia Basin is an oceanic basin in the South Atlantic Ocean, near its border with the Southern Ocean. The basin is found southeast of Tierra del Fuego, south of the Falkland Islands and South Georgia, west of the South Sandwich Islands, north of the South Orkney Islands and northeast of the South Shetland Islands and Antarctic Peninsula. It forms the western portion of the Scotia Plate.[1]
The basin's floor is covered by a variety of minerals, likely to be volcanically or glacially derived. Dredge sites from the West Scotia Ridge primarily yielded basaltic rocks (eg. lava, hyaloclastites) along with smaller quantities of granitoids, metasedimentary rocks and gneiss. Recovered samples from the North Scotia Ridge contained glacial striations, such as pelite, sandstone, paragneiss, granitoids, biotite-quartz schists,porphyrites and tonalite.[2]
References
edit- ^ Beniest, Anouk; Oldenhage, J. H.; Schellart, W. P. (November 8, 2023). "The Tectonic Evolution of the Scotia Sea Region from the Cretaceous until today". Tectonics. doi:10.22541/au.169945441.19321859/v1 – via Authorea.
- ^ Riley, Teal R.; Carter, Andrew; Leat, Philip T.; Burton-Johnson, Alex; Bastias, Joaquin; Spikings, Richard A.; Tate, Alex J.; Bristow, Charlie S. (July 15, 2019). "Geochronology and geochemistry of the northern Scotia Sea: A revised interpretation of the North and West Scotia ridge junction". Earth and Planetary Science Letters. 518: 136–147. Bibcode:2019E&PSL.518..136R. doi:10.1016/j.epsl.2019.04.031 – via Science Direct.
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