It's a lake -- with lots of ice on top

 

Just saw some recent articles about this new discovery of an Antarctic subglacial lake.  Lots to learn here, I would think.

Vast, City-Sized Lake Discovered Miles Below The Antarctic Ice Sheet

    "Lake Snow Eagle sits in a jagged canyon 1.6 kilometers deep, buried beneath the ice, but the radar reflections reveal that there's more than just water in the hidden lake. At the bottom of the lake sits a layer of unconsolidated sediment. 

    Given how long it takes sediment to accumulate in these subglacial environments, the team believes it must have been there for a very long time – perhaps since before the ice sheet even formed. 

     "This lake's been accumulating sediment over a very long time, potentially taking us through the period when Antarctica had no ice at all, to when it went into deep freeze," says glaciologist Martin Siegert of Imperial College London in the UK. 

     "We don't have a single record of all those events in one place, but the sediments at the bottom of this lake could be ideal." "

Where it is: