Robuta

https://www.bas.ac.uk/data/our-data/publication/crustal-block-origins-of-the-south-scotia-ridge/ Crustal block origins of the South Scotia Ridge - British Antarctic Survey The Cenozoic development of the Scotia Sea and opening of Drake Passage evolved in a complex tectonic setting with sea-floor spreading accompanied by the... south scotia ridgecrustal blockof thebritish antarcticorigins