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This article is about the physical-geographic term. For places named "Valley" see Valley (disambiguation). A valley is a landform, which can range from a few square miles (square kilometers) to hundreds or even thousands of square miles in area. It is typically a low-lying area of land, surrounded by higher areas such as mountains or hills.

Genesis of valleys


Valleys are formed by numerous geographical processes. Glacial valleys, which are usually U- rather than V-shaped, were formed tens of thousands of years ago (most likely during the last Ice Age) by the massive erosive power of glaciers. Several glacial valleys can be found in the English Lake District and many can be found in Alpine countries. Rift valleys, such as the Great Rift Valley, are formed by the expansion of the Earth's crust due to tectonic activity beneath the Earth's surface. Valleys are, however, most commonly formed by fluvial activity (the action of running water, such as rivers), which erodes the landscape.

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Lots to do this weekend! Nordic Heritage Festival, Kaw Valley Farm Tour, and Darwin the Dinosaur. Call for free tickets 785-843-7359
DougCoBBBS (Douglas Co. BBBS) Fri, 02 Oct 2009 15:13:41 -0000
Lots to do this weekend! Nordic Heritage Festival, Kaw Valley Farm Tour, and Darwin the Dinosaur. Call for free tickets 785-843-7359
PlayRoom: Dinosaur Train (Valley of the Stygimolochs; Tiny Loves Fish) on WGBH (2) at 09:30 AM on 10/02/2009.
TwiVo (TwiVo) Fri, 02 Oct 2009 14:02:09 -0000
PlayRoom: Dinosaur Train (Valley of the Stygimolochs; Tiny Loves Fish) on WGBH (2) at 09:30 AM on 10/02/2009.
Dinosaur Valley State Park is near Glen Rose & Fossil Rim. Great mountain biking, hiking, fossils, Paluxy River soak: http://bit.ly/19z68e
durangotexas (Durango Jones) Thu, 01 Oct 2009 20:57:09 -0000
Dinosaur Valley State Park is near Glen Rose & Fossil Rim. Great mountain biking, hiking, fossils, Paluxy River soak: http://bit.ly/19z68e
Fossil Rim Wildlife Center by Glen Rose & Dinosaur Valley is most fun I've had in Texas. Zebra bit my steering wheel: http://bit.ly/eWVP9
durangotexas (Durango Jones) Thu, 01 Oct 2009 20:55:10 -0000
Fossil Rim Wildlife Center by Glen Rose & Dinosaur Valley is most fun I've had in Texas. Zebra bit my steering wheel: http://bit.ly/eWVP9
Went hiking & had a picnic with my family over Labor Day weekend at Dinosaur Valley State Park in Glen Rose, TX
hiremax (Norm Bobay) Thu, 01 Oct 2009 19:00:07 -0000
Went hiking & had a picnic with my family over Labor Day weekend at Dinosaur Valley State Park in Glen Rose, TX
@rossmills Was (Not Was) / Hello Dad... I'm in Jail / Walk the Dinosaur / (Return to the Valley of) Out Come the Freaks (Semi/Historic 1983
spotifyuri (spotifyuri) Tue, 29 Sep 2009 09:51:03 -0000
@rossmills Was (Not Was) / Hello Dad... I'm in Jail / Walk the Dinosaur / (Return to the Valley of) Out Come the Freaks (Semi/Historic 1983

 
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