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Geology of National Parks
exam 2
11
Geology
Undergraduate 1
06/06/2007

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Term
Batholith
Definition
A very large intrusive igneous rock mass that has been exposed by erosion and with an exposed surface area of over 100 square kilometers. A batholith has no known floor.
Term
metamorphic facies
Definition
name for a particular group of metamorphic minerals stable at specific pressure and temperature condions
Term
Rocky Mountains
Definition
Precambrian Rocks, Laramide Orogeny in the early cenozoic, igneous and metamorophic rocks, schist, gneiss
Term
foliation
Definition
metamorphic rock tecture due to parallel alignments of elongate minerals develop parallel to pressures
Term
Alleghenian orogeny
Definition
(~300 my ago)

With continued subduction, finally collision of the African continent with North America occurred causing intense folding (most pronounced in the Valley and Ridge province) and metamorphism. The European and South American plates were also converging with North America at this time to form a super continent called Pangea.
Term
Mammoth Caves
Definition
long and linear,reef: submerged mound fromed by accummulation of plant and animal skeletons, late Paleozoic, sulfuric acid(hydrogen sulfide + O2)
Term
Sierra Nevada
Definition
Mezozoic aged granitic batholith, uplifted on normal fault of late Cenozoic age, extension- elevation of CO plateau intrusive igneous
Term
Causes of Ice Ages
Definition
orbital parameters of the earth that place it further from the sun
reduction in concentration of green house gases
Term
sinter
Definition
pourous silica deposited by a stream
Term
Angular unconformity:
Definition
An unconformity in which the bedding planes of the rocks above and below are not parallel.
Term
Appalachian Mountains
Definition
paleozoic, pangea forming, all three types of rock
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