Editing Extremes on Earth (section)

===Deepest ice===
Ice sheets on land, but having the base below sea level. Places under ice are not considered to be on land.
{| class="wikitable"
|[[Denman Glacier|Denman Subglacial Trench]]|| {{convert|−3500|m|abbr=on}} || [[Antarctica]]
|-
|Trough beneath [[Jakobshavn Isbræ]] || {{convert|-1512|m|abbr=on|0}}<ref>Plummer, Joel. [https://www.cresis.ku.edu/~plummer/jakob.html#Bed_1 Jakobshavn Bed Elevation] {{webarchive|url=https://web.archive.org/web/20100627071506/https://www.cresis.ku.edu/~plummer/jakob.html |date=27 June 2010 }}, Center for the Remote Sensing of the Ice Sheets, Dept of Geography, University of Kansas.</ref>|| [[Greenland]], [[Denmark]]
|}