Erosion
Mountain ranges are constantly subjected to erosional forces which work to tear them down. Erosion is at work while the mountains are being uplifted and long after until the mountains are reduced to low hills and plains. The rugged topography of a mountain range is the product of erosion. The basins adjacent to an eroding mountain range are filled with sediments which are buried and turned into sedimentary rock.
The early Cenozoic uplift of the Rocky Mountains of Colorado provide an example. As the uplift was occurring some 10,000 feet (3,000 m) of mostly Mesozoic sedimentary strata were removed by erosion over the core of the mountain range and spread as sand and clays across the Great Plains to the east. This mass of rock was removed as the range was actively undergoing uplift. The removal of such a mass from the core of the range most likely caused further uplift as the region adjusted isostatically in response to the removed weight.
Read more about this topic: Mountain Range
Famous quotes containing the word erosion:
“Inter-railers are the ambulatory equivalent of McDonalds, walking testimony to the erosion of French culture.”
—Alice Thompson (b. 1963)
“The new concept of the child as equal and the new integration of children into adult life has helped bring about a gradual but certain erosion of these boundaries that once separated the world of children from the word of adults, boundaries that allowed adults to treat children differently than they treated other adults because they understood that children are different.”
—Marie Winn (20th century)
“What if we fail to stop the erosion of cities by automobiles?... In that case America will hardly need to ponder a mystery that has troubled men for millennia: What is the purpose of life? For us, the answer will be clear, established and for all practical purposes indisputable: The purpose of life is to produce and consume automobiles.”
—Jane Jacobs (b. 1916)