While glacial lake outburst floods can be catastrophic in populated ... At the end of the last Ice Age, Lake Missoula had an outburst that was 2,500 times larger than the recent Catalina event.

Geologists believe these erratics arrived inside icebergs caught in a Glacial Lake Missoula flood. When the bergs grounded and melted here, the rocks were left high and dry, hundreds of miles from ...

Glacial Lake Missoula was metastable and its ice dam released episodic ... during the last glaciation around 18,000 years ago. The erosive power of the Missoula Floods incised the Channeled Scabland ...