Tuscaloosa Seamount

The Tuscaloosa Seamount is an undersea mountain in the Hawaiian archipelago. It is about 100 kilometres (62 mi) northeast of the island Oʻahu. In contrast to the overwhelming majority of seamounts, the Tuscaloosa Seamount is not a submarine volcano. 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. The Tuscaloosa Seamount is 30 km (19 mi) long and 17 km (11 mi) wide. 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.

Tuscaloosa Seamount

The Tuscaloosa Seamount is an undersea mountain in the Hawaiian archipelago. It is about 100 kilometres (62 mi) northeast of the island Oʻahu. In contrast to the overwhelming majority of seamounts, the Tuscaloosa Seamount is not a submarine volcano. 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. The Tuscaloosa Seamount is 30 km (19 mi) long and 17 km (11 mi) wide. 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.