A crater lake is an accumulation of water, usually by precipitation of rain or snow but sometimes
ground water, in a volcanic crater (caldera).
Should an eruption occur, the resulting mudflow (lahar)
is often more destructive than a lava flow owing to its greater speed. A
noted example is Crater Lake, in Crater Lake Park, Oregon. The waters of
the lake were formed by precipitation and are maintained solely by rain
and snow; there is no outlet.
|Crater Lake, Oregon
AND PLANETARY SCIENCE