Adams Seamount
| Adams Seamount, Forty Mile Reef | |
|---|---|
| Summit depth | 39 m (128 ft) |
| Height | 3,500 m (11,500 ft) |
| Location | |
| Location | Pacific Ocean, SW of Pitcairn Island |
| Coordinates | 25°22′S 129°16′W / 25.367°S 129.267°W |
| Geology | |
| Last eruption | 50 BCE ± 1000 years |
Adams Seamount (also known as Forty Mile Reef) is a submarine volcano above the Pitcairn hotspot in the central Pacific Ocean about 100 kilometres (62 mi) southwest of Pitcairn Island.