Guyots – Guyots (pronounced “Ghe Oh’s”) are “an isolated (or group of) seamount (s) having a comparatively smooth flat top. Also called tablemount(s)” (IHO, 2008). Harris et al. (2014) mapped 283 guyots covering a total area of 707,600 km2. Guyots have an average area of 2,500 km2, more than twice the average area of seamounts. Nearly 50% of guyot area and 42% of the number of guyots occur in the North Pacific Ocean, covering 342,070 km2 (see Table). The largest three guyots are all in the North Pacific: the Kuko Guyot (estimated 24,600 km2), Suiko Guyot (estimated 20,220 km2) and the Pallada Guyot (estimated 13,680 km2).
Bathymetric false-colour image of the Gifford Guyot, located in the Tasman Sea east of Australia (after Geoscience Australia: http://www.ga.gov.au/ausgeonews/ausgeonews200803/survey.jsp
Statistics on guyots (after Harris et al., 2014)
For details of guyot evolution and biota, see entry for “seamounts”.
|Ocean||Guyot Area km2||Guyot Area%||Guyot Number||Mean Guyot size km2|
|Mediterranean & Black Sea||2,800||0.0926||2||1,400|
|North Atlantic Ocean||31,640||0.0707||8||3,960|
|North Pacific Ocean||499,990||0.610||119||4,200|
|South Atlantic Ocean||133,710||0.331||43||3,110|
|South Pacific Ocean||187,900||0.215||77||2,440|
Harris, P.T., MacMillan-Lawler, M., Rupp, J., Baker, E.K., 2014. Geomorphology of the oceans. Marine Geology 352, 4-24.
IHO, 2008. Standardization of Undersea Feature Names: Guidelines Proposal form Terminology, 4th ed. International Hydrographic Organisation and Intergovernmental Oceanographic Commission, Monaco, p. 32. http://www.iho.int/iho_pubs/bathy/B-6_e4_EF_Nov08.pdf