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Erosion and California Landscape

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by

Dan Grubb

on 19 February 2015

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Transcript of Erosion and California Landscape

Shorelines and Erosion
California has 1,100 miles of shoreline, how did the sand get there?
A
beach
is a landform consisting of loose sand and gravel. California's steep shores have been created by beach erosion. Sand is supplied by the continuous flow of rivers to the ocean. Granite rocks from Saddleback Peak are eroded down to small pieces and eventually end up at Doheny Beach following Trabuco Creek. Most sediment moves when we have heavy rains.

Cliffs
are formed through the constant erosion of waves and wind.
Some other erosional features are wave cut platforms, sea caves, sea stacks and sea arches.
Glaciers
Glaciers are large masses of ice and snow. Move slow at about 2.5 cm per day. Glaciers make up about
66
percent of fresh water on Earth.
Two types of glaciers,
valley
and
alpine
Antartica and Greenland are the only continental glaciers on Earth.
As they move the rocks trapped inside groove out the ground around them.
As they melt the deposited sediment that has been frozen in the ice becomes
Till,

outwash
and
moraine.
These are types of sediment deposited by glaciers.


California Landscapes
Landscapes of California
1. Mountains
2. Deserts
3.Central Valley
4. Coast

Glaciated Mountains
Glaciers have helped to shape the mountains of California
Wind Erosion
Erosion and California Landscape
Longshore transport
or
longshore drift
is when waves from the
longshore current
approach the beach in a three step process. Waves move sand along the beach in a zig zag motion.
Ads be ready to close
Sand dunes
and
Loess
are two types of wind deposits.
lo·ess: a loosely compacted yellowish-gray deposit of windblown sediment of which extensive deposits occur, e.g., in eastern China and the American Midwest.
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