:For the French viticulturist, see Jules Guyot. For the Old French name, see Guiot. A guyot /giɘʊ/, also known as a tablemount,'s a flat-topped seamount. It was named after the Swiss-American geographer and geologist Arnold Henry Guyot (died 1884). The term was coined around 1946 by Harry Hammond Hess. Guyots are most commonly found in the Pacific Ocean. Guyots show evidence of having been above the surface with gradual subsidence through stages from fringed reefed mountain, coral atol… (More on Guyot)