The Tuscaloosa Seamount is an undersea mountain in the Hawaiian archipelago. It is about 100 kilometres (62 mi) northeast of the island Oʻahu.
| Tuscaloosa Seamount | |
|---|---|
| Highest point | |
| Elevation | -2765 |
| Coordinates | 22°4′0″N 157°5′0″W |
| Geography | |
| Location | Pacific |
| Region | US-HI (Hawaii) |
| Geology | |
| Age of rock | 1.5 to 2 ma |
| Mountain type | hyaloclastite |
In contrast to the overwhelming majority of seamounts, the Tuscaloosa Seamount is not a submarine volcano.[1] It is a huge block of rocks that broke off about two million years ago at the Nuʻuanu submarine landslide when the volcano Koʻolau collapsed.[2]
The Tuscaloosa Seamount is 30 km (19 mi) long and 17 km (11 mi) wide.[3] Its shallow summit rises 1.8 kilometres (1.1 mi) across the sea bottom but is 2,756 metres (9,042 ft) below sea level.[4]