Yonaguni Knoll IV

Yonaguni Knoll IV
Location in Okinawa Trough
Summit depth745 metres (2,444 ft)
Location
LocationOkinawa Trough, east of Taiwan
Coordinates24°54′N 122°48′E / 24.900°N 122.800°E / 24.900; 122.800

Yonaguni Knoll IV is a seamount in the Okinawa Trough, east of Taiwan. It lies at about 745 metres (2,444 ft) depth and formed through Quaternary volcanism that yielded dacitic and rhyolitic magmas. The seamount is hydrothermally active, with numerous sites that are colonized by mussels and other marine animals. A submarine underground "lake" of liquid carbon dioxide has been identified at Yonaguni Knoll IV.

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