- 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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Illinois Valley - Twitter SearchI find it strange that there can be an Illinois "valley". Where exactly are the Illinois mountains?bawhite2 (Brian White) Tue, 05 Jan 2010 18:38:53 -0000
I find it strange that there can be an Illinois "valley". Where exactly are the Illinois mountains?
Come cheer on your CSC Basketball Teams as they play Illinois Valley: Women at 5:30pm, Men at 7:30pm. Go Chargers! http://bit.ly/8TcG3JCSCChargers (CarlSandburgCollege) Tue, 05 Jan 2010 15:50:39 -0000
Come cheer on your CSC Basketball Teams as they play Illinois Valley: Women at 5:30pm, Men at 7:30pm. Go Chargers! http://bit.ly/8TcG3J
Happiness is in the heart not in the circumstances. We have affiliates in Trout Valley Illinois. http://ihid.us?i=6iystockbonn (Michael Stockton) Tue, 05 Jan 2010 01:38:29 -0000
Happiness is in the heart not in the circumstances. We have affiliates in Trout Valley Illinois. http://ihid.us?i=6iy
Los Angeles,CA, Sacramento, CA, Japan, India, Deutchland, Illinois, Orlando, FL, Grass Valley, CA, SF East-CisaG (Chris Greene) Mon, 04 Jan 2010 12:50:06 -0000
Los Angeles,CA, Sacramento, CA, Japan, India, Deutchland, Illinois, Orlando, FL, Grass Valley, CA, SF East-
Hear the meaning within the word. We have affiliates in Green Valley Illinois. http://ihid.us?i=ecaPatrickCarter (Patrick j.Carter) Sun, 03 Jan 2010 22:02:35 -0000
Hear the meaning within the word. We have affiliates in Green Valley Illinois. http://ihid.us?i=eca
Bluejays Soar Past Redbirds: Illinois State suffered its first Missouri Valley Conference losing 69-44. http://bit.ly/78GfvMCIProud (CIProud) Sun, 03 Jan 2010 04:46:43 -0000
Bluejays Soar Past Redbirds: Illinois State suffered its first Missouri Valley Conference losing 69-44. http://bit.ly/78GfvM
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