Hawaiian Trough

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The Hawaiian Trough, also known as the Hawaiian Deep, is a depression of the sea floor surrounding the Hawaiian Islands, where the massive weight of the island chain downwarps the oceanic lithosphere; surrounding the islands like a moat, it is roughly 5500 meters deep.[link] However, in accordance with the principle of isostasy, the sinking of the lithosphere is balanced by a corresponding rise beyond it, known as the Hawaiian Arch.[link] The Big Island itself is still subsiding, at a rate of about 2.5 millimeters per year.[link]

Sources:

• [Hawaiian Submarine Volcanism]

• [Volcano World: Introduction to Hawaiian Volcanoes]

External links

• [Overview of Hawaiian Arch geology (PDF)]

• [New Evidence for Massive Landslides from the Hawaiian Islands (PDF)]

See also

• Hawaiian Arch

• Submarine landslide

 

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