Dust Bowl
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The Dust Bowl or the Dirty Thirties was a period of severe dust storms causing major ecological and agricultural damage to American and Canadian prairie lands from 1930 to 1936. The phenomenon was caused by severe drought coupled with decades of extensive farming without crop rotation, fallow fields, cover crops and other techniques to prevent erosion. Deep plowing of the virgin topsoil of the Great Plains had killed the natural grasses that normally kept the soil in place and trapped moisture even during periods of drought and high winds. During the drought of the 1930s, with no natural ancho...
The Dust Bowl or the Dirty Thirties was a period of severe dust storms causing major ecological and agricultural damage to American and Canadian prairie lands from 1930 to 1936. The phenomenon was caused by severe drought coupled with decades of extensive farming without crop rotation, fallow fields, cover crops and other techniques to prevent erosion. Deep plowing of the virgin topsoil of the Great Plains had killed the natural grasses that normally kept the soil in place and trapped moisture even during periods of drought and high winds. During the drought of the 1930s, with no natural anchors to keep the soil in place, it dried, turned to dust, and blew away eastward and southward in large dark clouds. At times the clouds blackened the sky reaching all the way to East Coast cities such as New York and Washington, D.C. Much of the soil ended up deposited in the Atlantic Ocean, carried by prevailing winds which were in part created by the dry and bare soil conditions itself. These immense dust storms given names such as "Black Blizzards" and "Black Rollers" often reduced visibility to a few feet (around a meter).
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