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Prince Edward Island
"Uninhabited 5 x 10 km wide Prince Edward Island lies opposite Marion Island at the northern end of a submarine plateau on the Antarctic Plate immediately south of the SW Indian Ocean Ridge. The low-angle Prince Edward Island is a remnant of a large shield volcano formerly centered off the current NW shore of the island. Pleistocene and Holocene scoria cones and tuff cones are located throughout the unglaciated 672-m-high island, which was active contemporaneously with nearby Marion Island. Fifteen of the scoria cones and four tuff cones on the coastal plain were active during the Holocene."  -Smithsonian Volcano Archive
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