The dormant volcano appears to have formed by mantle rising from the transition zone—the first time this has been documented.
A volcano beneath Bermuda formed in a way that has never been seen before, scientists have discovered. The volcano appears to have been created by material rising up from a region deep beneath Earth's surface—the transition zone.
Now, researchers have found volcanoes can also form when material moves up from the transition zone. The team believes there was a disturbance in the transition zone that forced the material in this layer to melt and move up towards the surface. Their findings are published in the journal Nature. In a statement, he said they were expecting to show that the volcano was a mantle plume formation like Hawaii. This was not what they found, however. The measurements taken from the core sample were unlike anything seen before, suggesting the lava came from a previously unidentified source.
Illustration showing how the volcano formed. Wendy Kenigsberg/Clive Howard – Cornell University, modified from Mazza et al.
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