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The stable core of a body of continental crust- consists of basement shield and platform. |
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relatively narrow regions near continental margins where tectonic processes and/or volcanism have created high standing areas with rugged terrain. |
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The condition of balance, or quilibrium, in which the lithosphere floats on the asthenosphere |
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The vertical movement that occurs in response to a changing lithospheric burden upon the asthenosphere |
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The combination of physical processes that disintegrate rocks without chemical change. Example: exfoliation jointing, thermal expansion, etc. |
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The surface processes that decompose rocks and minerals through chemical reactions. Formula: primary minerals+water,acid,oxygen --> rocks fragments, secondary minerals, and/or dissolved ions. |
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Interplay of Mechanical and Chemical Weathering |
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Mechanical weathering provides more surface area on which chemical attack can occur and chemical weathering weakens a rocks fabric where the discontinuities create pathways along which physical weathering can occur |
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The result of mesozoic igneous activity associated with the subduction of the Farallon plate beneath North America |
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Main Features of Yosemite National Park |
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Deep glacier carved valleys, spectacular waterfalls, uplifted and eroded granitic plutons. |
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