Field Guide Minerals Glossary of Terms. ... Oceanic crust A large mass of medium density material, consisting of basaltic igneous and/or sedimentary rocks, that sits on top of the earth’s mantle. Oceanic crust typically underlies ocean basins and varies from about 5 to 10 kms in thickness.
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sdnhm.org/research/geology/glossary.html
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Tectonic plates are broadly divisible into two groups: continental and oceanic plates. The distinction is based on the density of their constituent materials; oceanic plates are denser than continental plates due to their greater mafic mineral content.
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www.knowledgerush.com/kr/encyclopedia/Tectonic_plates/
www.knowledgerush.com/kr/encyclopedia/Tectonic_plates/
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At divergent boundaries, two plates move apart from each other and the space that this creates is filled with new crustal material sourced from molten magma that forms below. ... Where two continental plates collide the plates either crumple and compress or one plate burrows under or (potentially) overrides the other.
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www.crystalinks.com/tectonicplates.html
www.crystalinks.com/tectonicplates.html
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7. Using a simple model of plate tectonics explain how this model operates in terms of the lithosphere, oceanic and continental crust, upper mantle, crustal plates, hotter and weaker asthenospehere, heat transfer systems, ... List the type of material that underlies continental shelves and continental crust.
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hrsbstaff.ednet.ns.ca/wambolrk/Oceans%2011%20Course%20O...
hrsbstaff.ednet.ns.ca/wambolrk/Oceans%2011%20Course%20Outcomes%202005.htm
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The hot spot believed to have created the Mid-Atlantic Ridge system currently underlies Iceland which is widening at a rate of a few centimetres per century. ... Sometimes, when there is a convergent boundary between two continental plates, subduction cannot occur. Since continental crust is more bouyant, or less dense,
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www.lycos.com/info/plates--boundaries.html
www.lycos.com/info/plates--boundaries.html
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Thrust faults are formed by compressive stresses, and therefore often form where two tectonic plates collide, for example where an oceanic plate is subducted (such as along the Aleutian Islands) or where two continental plates collide and a mountain range is formed (such as the Himalayas).
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www.talkorigins.org/faqs/lewis/
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The plates are around 100 km (60 miles) thick and consist of lithospheric mantle overlain by either of two types of crustal material: oceanic crust (in older texts called sima from silicon and magnesium) and continental crust (sial from silicon and aluminium).
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www.newuniverse.co.uk/Plate_tectonics.html
www.newuniverse.co.uk/Plate_tectonics.html
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Asthenosphere: Portion of the mantle beneath the lithosphere composed of partially melted material. ... Mantle: Thick, dense layer of rock that underlies Earth's crust. ... Continental-continental plates. Continental-continental convergent plates act quite differently than oceanic-oceanic plates. Continental crust is too...
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www.scienceclarified.com/Ph-Py/Plate-Tectonics.html
www.scienceclarified.com/Ph-Py/Plate-Tectonics.html
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The distinction is based on the density of constituent materials; .... It was apparent that a layer of basalt underlies continental rocks. ...
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infao5501.ag5.mpi-sb.mpg.de:8080/topx/archive?link=Wiki...
infao5501.ag5.mpi-sb.mpg.de:8080/topx/archive?link=Wikipedia-Lip6-2/24944.xml&style
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