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15 Cards in this Set
- Front
- Back
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igneous rocks |
formed through the cooling and solidification of magma or lava.
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intrusive |
-forms IN the ground (underground) -take a long time to develop |
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extrusive |
-cools quickly and takes little or no time to develop -fine grained or glassy vesicular gas pockets |
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sedimentary rocks |
Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice ( glaciers ), and wind. Sedimentary rocks are often deposited in layers, and frequently contain fossils.
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sedimentary lithification |
cementing Compacting/compression precipitation |
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source of sediment |
-rock/mineral fragments (from any pre-existing rock) -plant and animal remains -also precipitated in lakes and oceans from evaporation |
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clastic |
made of fragments of pre existing rocks |
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non clastic |
-chemical (crystalline) -precipitates from evaporation -bioclastic (organic) -remains of plants and animals |
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metamorphic |
Rock that was once one form of rock but has changed to another under the influence of heat, pressure, or some other agent without passing through a liquid phase
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formation of metamorphic |
-other rocks change from heat and pressure -recrystallization=change without melting |
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changes in metamorphic rocks from original |
-new minerals -more dense -less porous -distorted |
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regional metamorphism |
(more dense than contact) High Pressure with lower heat deeper the burial= more metamorphism |
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contact metamorphism |
-molten rock comes in contact with surrounding rocks high heat and lower pressure |
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greatest change= |
closest to molten rock |
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transition zone |
where metamorphic rocks form from contact metamorphism |
