US Parks Unit 4

30 terms by ajirout

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plate boundaries

the edge of a tectonic plate, where movement can be detected

divergence

when plates move a part and the space between fills with magma, causes small scale mountains to build

convergence

plates coming together, causes uplift and large scale mountain building, can cause volcanoes to form

graben

a long, narrow area that has dropped between two faults

transform boundaries

plates grind past each other, causes mountain building

convection

the transfer of thermal energy by the circulation or movement of a liquid or gas, happens in the mantle and drives plat moment

subduction

a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate

trenches

formed when leading edge of plate subducts, usually in the ocean floor

rifting

The process by which Earth's crust breaks apart, can occur within continental crust or oceanic crust

ridges

raised,narrow strips on the ocean floor, resembles mountians

hot spot

Unusually hot area in Earth's mantle that is stationary for long periods of time, where high-temperature plumes of mantle material rise toward the surface, yellowstone

magnetic reversal

the poles are always changing due to the crust always moving

oceanic crust

the portion of Earth's crust that is usually below the oceans and not associated with continental areas, thinner and higher in density that continental crust and basaltic rather than granitic in composition

continental crust

The portion of the earth's crust that primarily contains granite, is less dense than oceanic crust

fault

break in earth's crust along which movement occurs

focus

The point beneath Earth's surface where rock breaks under stress and causes an earthquake

epicenter

the point on the Earth's surface directly above the focus of an earthquake

Alfred Wagner

Published the idea continental drift in 1904 and had emperical data

Pangaea

the supercontinent that was believed to exist in the mesezoic period

crust

the outer layer of the Earth

mantle

the layer of the earth between the crust and the core, filled with plastid material

core

core and inner core, center of the earth

midatlantic ridge

chain of underground mountains formed from divergent plates

Channel Island NP

off coast of California, 40 ft Arch Rock, Volcanic Islands, Island fox made the fastest come back of any endangered animal

Great Basin NP

Nevada, Wheeler Peak is the only glacier in the state, fire plays a huge role in the park, "Cold Desert"

Black Canyon of the Gunnison NP

Colorado, and irrigation system was put in called "Diversion Tunnel" contains the painted wall which is igneous dikes

Sequoia and Kings Canyon NP

California, "land of the Giants" requires fire for seed distribution, General Sherman is the largest living organism on the planet, biggest trees in the world

Great Smoky Mountains NP

Tennessee and NC, Cherokee lived here before trail of tears, oldest mountains in the world, Salamander capital of the world

Redwood NP

California, Tallest trees in world, interlock roots with others, has 4 sections, national and state parks

Death Valley NP

Cali and Nevada, contains a graben, roaming rocks, hottest and driest place in the U.S.

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