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29 Cards in this Set
- Front
- Back
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Igneous rocks are classified by
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texture and mineral composition.
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breccia
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comglomerate but angular, small pebble pieces
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rock salt
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pure NaCl
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a layered or banded appearance
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foliation
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limestone
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composed chiefly of the mineral calcite- calm shallow seas
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other sedimentary rock features
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fossils, ripple marks, cross bedding- sand dunes, layers of strata, mud cracks
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Crystal
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settling can change the composition of magma and cause more than one rock type to form from a common parent magma.
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marble
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reheated limestone
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gneiss
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cmes rom granite
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The most abundant chemical sedimentary rock is
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limestone,
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conglomerate
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madeby fast moving river, rounded from travel, long time
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fast cooling magma
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fine grained/ aprthyrite textures
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Common detrital sedimentary rocks
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shale, sandstone, and conglomerate.
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cools in air from volcanix explosion
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glassy
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Metamorphic rocks
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reheat or presurized rocks to form new crystals and deformation (foliations) of a former rock
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chert
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deposited out of liquid flint,
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sandstone
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made up of sand (small)
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cools slowly, than faster or very fast
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large crystals nd small crystals or large crystals and ground mass
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Metamorphic rock
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forms from rock that has been subjected to great pressure and heat in a process called metamorphism.
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Igneous rock
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forms from magma that cools and solidifies in a process called crystallization
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Slow Cooling magma
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course grained
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commone metamorhic rocks
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gniess, slate, marble
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slate
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comes from shale
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cools in lava surface
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vesicles
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Sedimentary rock
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forms from the lithification of sediment
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Gypsum
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Depostion of liquid
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travertine
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(CaCO3)found in caves
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shale
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(the most common sedimentary rock), mudstone, quiet muddy environment
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Compaction and cementation
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transform sediment into solid sedimentary rock.
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