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30 terms

US Parks Unit 4

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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.