An underwater mountain (seamount) with a flat top, found on the ocean floor.
Named after Arnold Henry Guyot, a 19th-century geographer who studied mountains. The term was coined by geologists to honor his contributions to geography.
Guyots are undersea mountains that were once islands—their flat tops prove they were once high enough to be worn down by waves, then sank as the ocean floor shifted, preserving an underwater record of Earth's history.
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