|coulee (ˈkuːleɪ, -lɪ)|
|1.||a. a flow of molten lava|
|b. such lava when solidified|
|2.||(Western US), (Canadian) a dry stream valley, especially a long steep-sided gorge or ravine that once carried melt water from a glacier|
|3.||a small intermittent stream in such a ravine|
|[C19: from Canadian French coulée a flow, from French, from couler to flow, from Latin cōlāre to sift, purify; see |
a dry channel lying in a semiarid or desert area and subject to flash flooding during seasonal or irregular rainstorms. Such transitory streams, rivers, or creeks are noted for their gullying effects and especially for their rapid rates of erosion, transportation, and deposition. There have been reports of up to 8 feet (2 m) of deposition in 60 years and like amounts of erosion during a single flood event
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