Lecture 24 Mar 26 2008 Physiographic provinces and karst

Lecture 24 Mar 26 2008 Physiographic provinces and karst -...

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The cycle of splitting of a supercontinent, opening of an ocean basin, closing of the ocean basin, and collision of continents is known as the Wilson cycle.
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The rifting of Pangea can be dated by the extensional features in the Piedmont.
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Generalized cross section of the geologic provinces of Virginia. The underlying geology acted upon by weathering and erosion determines the present-day physiography (the landforms).
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Large-scale deformation of Earth’s crust is one important factor forming the landscape we see today.
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Tectonic forces drive lithospheric plate movements and the formation of rocks and structures. Types of rocks and structures are predictable from knowledge of tectonic setting. NO ROCK IS A SURPRISE!
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Mountain building takes place where plates collide. Continents gain material in plate collisions (accretion of exotic terranes) and during subduction of ocean crust (melting of ocean crust, magmatism, and formation of new continental rock).
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One third of Earth’s surface is covered by
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Lecture 24 Mar 26 2008 Physiographic provinces and karst -...

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