Alexa Bank
Seamount in Samoa, northwest of Rotuma / From Wikipedia, the free encyclopedia
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Alexa Bank is a seamount in Samoa, northwest of Rotuma.[1] The seamount reaches a depth of 18–21 metres (59–69 ft) below sea level and has the appearance of an atoll with a flat top and steep slopes. Some active coral growth takes place at its top, but if it ever was an active atoll it has now drowned. It was probably formed by the Samoa hotspot 24 million years ago, although older volcanism about 40 million years ago has also been identified.
Quick Facts Summit depth, Location ...
Alexa Bank | |
---|---|
Summit depth | 18–21 metres |
Location | |
Location | Rotuma |
Group | Melanesian Border Plateau |
Coordinates | 11.5833°S 175.33°E / -11.5833; 175.33 |
Country | Samoa |
Geology | |
Type | Seamount |
Age of rock | 37-24 million years |
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