Prior to this survey, researchers believed that the lake had been frozen for millions of years and that it contained no life.

Lake Enigma was thought to be frozen right through, since it's in Antarctica's Northern Foothills, nestled between Amorphous ...

This is an area of weak boulder clay. Salt marshes may be formed behind a spit. The zone behind a spit becomes a sheltered area. Water movement slows down and so more material is deposited.