[vc_row][vc_column width=”1/1″][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]Abyssal mountains – Mountains on the seafloor at abyssal depths having a vertical relief of greater than 1,000 m within a search radius of ~25 km are termed “abyssl mountains” (Harris et al., 2014).  They include discrete guyots, seamounts, ridges (classes that are superimposed over “mountains”) and other positive relief features.

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Abyssal classification categories (after Harris et al., 2014).  The percentage areas first line refers to percentage of ocean basin area and the second line (in brackets) refers to percentage of abyssal area.[/vc_column_text][vc_row_inner][vc_column_inner width=”1/1″][vc_table vc_table_theme=”classic_blue” allow_html=””]Ocean,Abyssal%20Plain%20Area%20km2,Abyssal%20Plain%20Area%25,Abyssal%20Hills%20Area%20km2,Abyssal%20Hills%20Area%20%25,Abyssal%20Mountains%20Area%20km2,Abyssal%20Mtns.%20Area%20%25%0A|Arctic%20Ocean%0AAbyssal,2%2C068%2C570,15.9%0A(38.7),2%2C244%2C920,17.3%0A(42),1%2C036%2C060,7.98%0A(19.4)|Indian%20Ocean%20%0AAbyssal,21%2C772%2C790,30.5%0A(34.7),30%2C179%2C170,42.3%0A(48),10%2C859%2C500,15.2%0A(17.3)|Mediterranean%20and%20Black%20Sea%20%20-%20Abyssal,612%2C870,20.3%0A(43.6),613%2C830,20.3%0A(43.7),179%2C220,5.93%0A(12.7)|North%20Atlantic%20Ocean%20Abyssal,10%2C255%2C540,22.9%0A(30.4),16%2C477%2C470,36.8%0A(48.9),6%2C987%2C830,15.6%0A(20.8)|North%20Pacific%20Ocean%20Abyssal,24%2C906%2C630,30.4%0A(36.2),29%2C676%2C230,36.2%0A(43.2),14%2C137%2C990,17.3%0A(20.6)|South%20Atlantic%20Ocean%20Abyssal,10%2C033%2C650,24.8%0A(27.4),19%2C511%2C510,48.3%0A(53.3),7%2C031%2C560,17.4%0A(19.2)|South%20Pacific%20Ocean%20Abyssal,22%2C648%2C400,26%0A(28),44%2C059%2C800,50.6%0A(54.4),14%2C299%2C470,16.4%0A(17.7)|Southern%20Ocean%20Abyssal,8%2C565%2C270,42.1%0A(50.4),6%2C688%2C370,32.9%0A(39.3),1%2C749%2C840,8.6%0A(10.3)|All%20Oceans%0AAll%20Abyssal,100%2C863%2C730,27.9%0A(32.9),149%2C451%2C310,41.3%0A(48.7),56%2C281%2C460,15.6%0A(18.4)[/vc_table][/vc_column_inner][/vc_row_inner][vc_column_text]

References

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[/vc_column_text][/vc_column][/vc_row]