Missoula floods

A jökulhlaup (Icelandic pronunciation: ​[ˈjœːkʏlˌl̥œip] pronunciation (last word in a list) (help·info)) (literally "glacial run") is a type of glacial outburst flood.^[1] It is an Icelandic term that has been adopted in glaciological terminology in many languages. It originally referred to the well-known subglacial outburst floods from Vatnajökull, Iceland, which are triggered by geothermal heating and occasionally by a volcanic subglacial eruption, but it is now used to describe any large and abrupt release of water from a subglacial or proglacial lake/reservoir.

• http://en.wikipedia.org/wiki/Missoula floods
• https://www.google.com/maps/d/u/0/viewer?mid=14YY3J0HLMehpL22SVtE7LYReVC80PyxR&hl=en&ll=47.96975866972317%2C-116.53958861689571&z=19 
• https://en.wikipedia.org/wiki/J%C3%B6kulhlaup