Subjects:
landscaping would be similar to mars. Erosion is often confused with weathering, people
believe that erosion is the act of breaking down sediments when in fact it is a mode of
transportation for these broken down sediments. Such modes of transportation are;
running water, glacial movement, and wind. Erosion by definition is, the process by which
earth materials are moved by natural agents like moving water, wind and ice. Deposition is
the depositing of theses sediments in certain areas. for example wind deposits sand on any
object where it continues to be deposited and forms a sand dune a large deposit if sand.
erosion and deposition happens in many ways in forms and in many places.
Running water is the most effective agent of erosion on the earth. running water
includes all water that falls on earth and moves down hill under the pull of gravity, be it
rain, snow or any other form of precipitation. like other agents of erosion, waters energy
comes from the sun. The sun lifts water by evaporation and eventually it is redeposited all
over the world. A key word to running water is carrying power. the carrying power of
. . .
Long island is one big terminal moriane and outwash from the glacier can be found south
of it. A river will roar straight
down a mountain carrying anything in its path because the mountain is on a slope, the
steeper the slope the greater the speed.
Eventually the glaciers will drop the boulders and they will remain there like solitary lost
giants. Over time the river deposits enough sediments to
completely separate the meander which forms an oxbow lake (“b” in diagram).
Continental glaciers are be born in polar regions of high altitude, almost any area that is
always constantly covered in snow. when regular sand is being deposited a nice rounded dune
is formed, but when loess or angular silt particles is being deposited the slipface will have
more of a stright drop to it. a big part of shaping this planet came from when the glaciers melted. Until the 1800’s geologist believed all the sediments deposited out of place all
over the country were transported there by a large flood, they even used this theory to
explain large boulders (sometimes the size of a house not at all rounded as they would be
if they were in a river) deposited right in the middle of a field or an area whose bedrock
was not at all similar to the composition of the boulder.
Winds are a powerful agent of erosion and a good example of deposition. The greater the slope of the bed of
a stream, the greater the velocity (or speed) the water will have, then the greater the
carrying power and in turn the greater the erosion. the bottom layers of ice begin to flow
downward or outward, (depending on the area) because of the pressure of overlying
snow and firn. as a glacier
moves it carries drift two types of it, out wash and till. some other key words are, slope, and velocity. All that running water is very impressive, but the most
impressive are the “mountain movers”.
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