Flashcards
The Rock Cycle
Flashcards do conjunto (25)
- 1Intrusionigneous rock formed below the Earth's surface. The magma can be forced into pre-existing rocks, for example either along bedding planes and joints, or by cutting across the existing rocks.
- 2Systemrefers to rocks laid down in a named time period and is shorter than an era
- 3Eramajor unit of time that contains several periods/systems
- 4Geological columntable that contains all of the eras and systems in the correct time sequence
- 5Foliationa texture in metamorphic rocks formed by the preferred alignment of flat/tabular minerals
- 6Metamorphic rockformed by the recrystallisation of other rocks in the solid state, due to pressure, temperature or both
- 7Silicatesmost important and abundant group of rock-forming mineraks, with an atomic structure containin SiO4, arranged as tetrahedra.
- 8Igneous rocka rock that has crystallised from a magma
- 9Sedimentary rocka rock composed of fragments that have been deposited, compacted and cemented
- 10Clastfragment of broken rock
- 11rockaggregate or mixture of one or more minerals
- 12Thin sectiona thin (0.03mm) slice of rock that is translucent, mounted on a glass slide and viewed through a microscope
- 13Upliftreturn of buried rocks to the Earth's surface by tectonic forces
- 14Extrusionemission of magma onto the Earth's surface where it forms a lava flow
- 15Crystallisationoccurs during the cooling of magma or lava so that solid mineral crysals form
- 16Magma accumulationmagma collecting within a magma chamber
- 17Partial meltingthe incomplete melting of rock in the lower crust or upper mantle
- 18Metamorphismthe changing of rocks in the Earth's crust by heat and/or pressure and/or volatile content. It is isochemical and occurs in the solid state
- 19Recrystallisationsolid state process that changes minerals into new crystalline metamorphic minerals
- 20Diagenesisall processes that take place in sediments at low temperature and pressure at or near the Earth's surface
- 21Burialoccurs when sediment is covered by younger layers of sediment accumulating on top of it
- 22Depositionlaying down of a sediment that occurs when a transporting agent loses energy
- 23Transportmeans by which weathered material is moved from one place to another by water, wind, ice or gravity
- 24Erosionremoval of weathered material, usually by the physical action of transported fragments
- 25Weatheringbreakdown of rocks in situ
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- Undergraduate Geology - Part 2 (The Rock Cycle) FlashCards sobre The Rock Cycle, criado por siobhan.quirk em 16-05-2013.
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- siobhan.quirk
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