Gilliss Guyot

Gilliss Guyot is a prominent flat-topped seamount in the central Pacific Ocean. Its flat summit identifies it as a guyot, an underwater volcanic mountain shaped by erosion and later subsidence.

Gilliss Guyot is named after the oceanographic research vessel USNS Gilliss. The vessel was involved in marine research and mapping work.

The feature is notable for helping advance geological mapping of the Pacific seafloor. Its shape and location provide information about submerged volcanic terrain.

Gilliss Guyot is described as a flat-topped seamount rather than a currently active volcano. Like other guyots, its present form reflects an older volcanic structure and later erosion and subsidence.