Mondo Knows Facts

Perito Moreno is one of few stable glaciers

While most glaciers shrink, this one advances and dams a lake until the ice gives way The glacier flows into Lago Argentino in Patagonia and periodically blocks an arm of the lake. Water rises behind the ice until pressure breaks through, a collapse that draws crowds and has happened many times. Its ice field is one of the largest reserves of fresh water outside the polar regions. It sits in Mondo's world geography collection, one of 200 facts that each trace back to the reference below.

Where this comes from

UNESCO World Heritage Centre

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

More facts like this

Tags: glaciers, argentina, lakes

Perito Moreno is one of few stable glaciers: the short answers

Where does this come from, and can I check it?
While most glaciers shrink, this one advances and dams a lake until the ice gives way. The figure is taken from UNESCO World Heritage Centre, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a world geography fact?
Yes. It sits on the World Geography shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?
The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.