The structure of the Earth - Key terms

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Undergraduate (The structure of the Earth) Physical Geography Fichas sobre The structure of the Earth - Key terms, creado por Sharondeep el 21/03/2014.
Sharondeep
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Sharondeep
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Suture line The zone marking the boundary of two colliding plates.
Benioff zone Area in the subduction zone where most earthquakes take place.
Lava Once magma reaches the Earth's surface it is known as lava.
Continental Shelf When continental crust is covered by an ocean.
Focus The centre of the earthquake.
Epicentre Lies directly above the focus and suffers the greatest intensity of seismic waves.
Longitudinal waves Have a push-pull motion where particles travel in the same direction as the waves.
Transverse waves Particles swing back and forth on a vertical plane like ocean waves.
Wavelength The distance between two peaks (or troughs) in a wave.
Viscous slow moving
Tephra Ash
Pyroclasts rocks
Pyroclastic Fire-broken
Lapilli small stones
bombs (volcano) larger material
Pumice Solidified foam, scum on top of the lava.
Nuee ardente Fast moving cloud of very hot, toxic gas.
Ignimbrite The material deposited by nuee ardente.
Solfatara Sulphurous deposits formed around a vent.
Pseudo-bedding Parallel horizontal planes.
Joints Small cracks in the layers of rock created during earth movements
Denudation Long-term sum of processes that cause the wearing away of the earth’s surface.
Precipitation (chemistry) It is the formation of a solid in a solution or inside another solid during a chemical reaction.
Rock outcrop The part of the rock formation that appears above the surface.
Metamorphic Changed in shape or form.
Decomposer Bacteria, fungi. Can be part of any trophic level E.g. detritivores.
Omnivore 'All-eaters'
Yield Production
Nutrient cycling The circulation of chemical energy from environment to organism and back.
Podsolic soil A leached soil formed mainly in cool, humid climates.
Ferrallitic Any one of a group of soils that form in the humid tropics as the result of chemical weathering.
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