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The Bear Seamount (left), a guyot in the northern Atlantic Ocean. In marine geology, a guyot (/ ˈ ɡ iː. oʊ, ɡ iː ˈ oʊ /), [1] [2] also called a tablemount, is an isolated underwater volcanic mountain with a flat top more than 200 m (660 ft) below the surface of the sea. [3] The diameters of these flat summits can exceed 10 km (6 mi). [3]
The Bear Seamount is the first guyot in a chain of about 30 extinct volcanoes extending in a straight line south-eastwards from the edge of the continental shelf near Woods Hole, Massachusetts to north-east of Bermuda. These seamounts resulted from the movement of a mantle plume hotspot. This hotspot is now under the Great Meteor Seamount.
The seamount lies in the Western Pacific Ocean [3] northwest of Marcus Island [5] and about halfway between Japan and the Marshall Islands. [6] The Marcus-Wake Seamounts lie nearby, [3] but MIT Guyot is a more isolated volcanic edifice [2] that is sometimes considered to be a member of the Japanese Seamounts. [7]
Horizon Guyot is a presumably Cretaceous guyot (tablemount) in the Mid-Pacific Mountains, Pacific Ocean.It is an elongated ridge, over 300 kilometres (190 mi) long and 4.3 kilometres (2.7 mi) high, that stretches in a northeast–southwest direction and has two flat tops; it rises to a minimum depth of 1,443 metres (4,730 ft).
Banc Capel is a guyot – a former atoll with steep sides and a flat top – and is swept by strong currents. There are no sandy or muddy substrates, the surface being occupied by rocks or gravel scree .
Nintoku Seamount or Nintoku Guyot is a seamount (underwater volcano) and guyot (flat top) in the Hawaiian-Emperor seamount chain. It is a large, irregularly shaped volcano that last erupted 66 million years ago. Three lava flows have been sampled at Nintoku Seamount; the flows are almost all alkalic (subaerial) lava. [4] It is 56.2 million ...
Topographic map of Zealandia that includes the Queensland Guyot at the sea bottom of the Tasman Sea in the line of the Tasmantid hotspot seamounts off the east coast of Australia. It is a basaltic volcano that erupted about 20,900,000 years ago, [ 2 ] with survey data that indicates it rises about 4,000 m (13,000 ft) above the local sea floor ...
Koko Guyot is a 48.1-million-year-old guyot, [3] a type of underwater volcano with a flat top, which lies near the southern end of the Emperor seamounts, about 200 km (124 mi) north of the "bend" in the volcanic Hawaiian-Emperor seamount chain. [5]