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VA Provinces
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The Earth is a dynamic system
The earth is constantly moving. The earth is solid. Inner core - iron Outer core – liquid, iron Mantle – rocky, plastic Crust – rocky, brittle
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What are the effects of the moving earth?
The constantly moving earth causes different areas of geography. This occurs through plate tectonics and geologic activity. This causes the 5 provinces of Virginia.
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Coastal Plain Flat area comprised of young unconsolidated sediments
Sediments are underlain by a crystalline basement rock These sediments were produced from erosion of the Appalachian mountains and Piedmont The eroded sediments were then deposited on the coastal plain
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Piedmont Means foot hills
An area of rolling hills underlain by igneous and metamorphic rocks The largest province Formed before the Appalachian Mountains
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Blue Ridge Has the oldest metamorphic and igneous rocks in the state (over 1 billion years old) Narrow region Separates the valley and ridge from the piedmont
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Valley and Ridge Long parallel valleys and ridges
Comprised of faulted and folded sedimentary rock Occurred when the plates from Africa and North America collided producing the a Appalachian Mountains Karst topography Acid rain eats away at limestone and forms caves and sinkholes. Luray caverns
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Appalachian Plateau Comprised of flat sedimentary rocks
The area consists of plateaus separated by faults Rugged and irregular Most of VA’s coal resources are found here
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