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Final
WOO geology 141 final
9
Geology
Undergraduate 1
04/28/2008

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Term
Craton
Definition
The stable core of a body of continental crust- consists of basement shield and platform.
Term
Mountain Belt
Definition
relatively narrow regions near continental margins where tectonic processes and/or volcanism have created high standing areas with rugged terrain.
Term
Isostasy
Definition
The condition of balance, or quilibrium, in which the lithosphere floats on the asthenosphere
Term
Isostatic Adjustment
Definition
The vertical movement that occurs in response to a changing lithospheric burden upon the asthenosphere
Term
Mechanical Weathering
Definition
The combination of physical processes that disintegrate rocks without chemical change. Example: exfoliation jointing, thermal expansion, etc.
Term
Chemical Weathering
Definition
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.
Term
Interplay of Mechanical and Chemical Weathering
Definition
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
Term
Sierra Nevada Batholith
Definition
The result of mesozoic igneous activity associated with the subduction of the Farallon plate beneath North America
Term
Main Features of Yosemite National Park
Definition
Deep glacier carved valleys, spectacular waterfalls, uplifted and eroded granitic plutons.
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