Definitions

Moraine dammed lake

Moraine-dammed lake

A moraine-dammed lake occurs when a terminal moraine has prevented some meltwater from leaving the valley. Its most common shape is that of a long ribbon (ribbon lake). Example of moraine dammed lakes include:

In the 19th century the Argentine explorer Francisco Perito Moreno proved that many Patagonian lakes draining to the Pacific where in fact part of the Atlantic basin but had been moraine dammed during the quaternary glaciations changing their outlets to the west. He Arguad that as originally belonging to the Atlantic basin these lakes should be awarded to Argentina.

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