US Parks Unit 4
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30 terms
Terms | Definitions |
|---|---|
 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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