where is it located?
Mid-Pacific Mountains, Pacific Ocean
Horizon Guyot
Horizon Guyot is a presumably Cretaceous guyot (tablemount) in the Mid-Pacific Mountains, Pacific Ocean. 
what is horizon guyot? A presumably Cretaceous guyot how was it named? It is named after the research vessel
wiki:9465915
Horizon Guyot [SEP] Introduction
Horizon Guyot is a presumably Cretaceous guyot (tablemount) in the Mid-Pacific Mountains, Pacific Ocean. It is an elongated ridge, over long and high, that stretches in a northeast-southwest direction and has two flat tops; it rises to a minimum depth of . The Mid-Pacific Mountains lie west of Hawaii and northeast of the Line Islands. It was probably formed by a hotspot, but the evidence is conflicting. Volcanic activity occurred during the Turonian-Cenomanian eras 100.5–89.8 million years ago and another stage has been dated to have occurred 88–82 million years ago. Between these volcanic episodes, carbonate deposition from lagoonal and reefal environments set in and formed limestone.