Ravine

For other uses, see the valley formation.

Homole Ravine, Pieniny, Poland

Inside a ravine in Upper Missouri River Breaks National Monument, Montana, United States.

A ravine is a very small valley—almost like a canyon but narrower—which is often the product of streamcutting erosion. Ravines are typically classified as larger in scale than gullies, although smaller than valleys. A ravine is generally a slope landform of relatively steep (cross-sectional) sides, on the order of twenty to seventy percent in gradient. Ravines may or may not have active streams flowing along the downslope channel which originally formed them; moreover, often they are characterised by intermittent streams, since their geographic scale may not be sufficiently large to support a perennial watercourse.

Notable ravines

• Ravine Gardens State Park, Florida
• Babi Yar, Kiev, Ukraine
• Toronto ravine system, Toronto, Ontario
• Ravines are featured prominently in many of the works of Ray Bradbury when writing about his hometown of Waukegan, Illinois in his book Dandelion Wine.
• Barranco, Lima, Peru.
• Lake Avenue Park in Hamilton, Ontario

File:Http://i842.photobucket.com/albums/zz350/lamascotto/LakeAvenuePark.jpg

Other terms

Other terms for ravine include

• cleuch
• dell
• gill
• glen
• kloof (South Africa)

See also

• Riparian zone
• Canyon / Gorge
• Chine
• Defile (geography)‎