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The St. Helena hotspot is a volcanic hotspot located in the southern Atlantic Ocean. It is responsible for the island of St. Helena and the St. Helena Seamount chain. It is one of the oldest known hotspots on Earth, which began to produce basaltic lava about 145 million years ago.[1]
16°S 6°W / 16°S 6°W / -16; -6
| Antarctic plate | |
|---|---|
| African plate | |
| Eurasian plate | |
| Indo-Australian plate | |
| Nazca plate | |
| North American plate | |
| Pacific plate | |
| South American plate | |
Proposed mechanisms: Mantle plume · Plate theory | |
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