Transcript Mountain Building

The study of erosion and its effects on
mountains
Bridget Kelly, Maura Shanahan, Samantha Sippel
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Erosion is the process by which sediment is
removed from its place of origin.
☼Sediment can be removed by running water,
winds or glaciers
☼A muddy river is an indication that sediment is
being transferred by water
☼A cloud of dust is a sign that sediment is being
transported by wind
☼http://www.brainpop.com/science/earthsystem/
erosion/
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.1 to .2 mm/year is a reasonable average rate of erosion
in mountains
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Isostatic compensation- The process in which lateral
transport at the surface of the earth by erosion or
deposition is compensated by lateral movements in a
subcrustal layer
☼ Causes the crust to rise when material is eroded
☼ Causes the crust to sink when material is added
☼ Erosion
of mountains may cause the
elevation of the highest peaks to increase
☼ Erosion
of the Himalayas removed carbon
dioxide from the atmosphere and lowered
global temperatures
Each year an estimated average of 1.8 tons of soil
erodes from 1 acre of Ohio Rural Lands
☼ With over 22 million rural acres in Ohio this
amounts to over 40 million tons of soil erosion and
costs close to $40 million per year
☼ This erosion occurs both naturally and from
human sources
☼ Natural erosion occurs because of flooding or the
washing out of stream banks
☼ Human sources include constructing roads and
buildings and tilling cropland
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