Concordia Subglacial Lake is a subglacial lake located beneath an ice sheet 3,850 m (12,630 ft) to 4,125 m (13,533 ft) thick. It has a surface of about 800 km2 (310 sq mi) and is ~ 300 m (980 ft) deep. The sloped surface of the water has an elevation from 623 m (2,044 ft) to 898 m (2,946 ft) below mean sea level. The elevation of the icecover, above Concordia Subglacial Lake is: 3,227 m (10,587 ft) m.a.s.l. It was first located in December 1999; the name derives from the nearby French-Italian Concordia Research Station.