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Goodrich-Rock vocab
Earth Science - rock vocabulary chapter 6
| Question | Answer |
|---|---|
| igneous rocks | formed by cooled and solidified magma |
| sedimentary rocks | formed by the compaction and cementation of layers of sediments |
| metamorphic rocks | rocks that have undergone chemical or structural change due to the effects of heat and pressure |
| plutonic | a land mass formed by magma that has cooled inside the earth's crust |
| volcanic | any substance that has exited the earth's crust via a volcano |
| felsic | light-colored |
| mafic | dark-colored |
| porphyritic | containing conspicuous crystals surrounded by a fine-grained mass |
| phaneritic | rocks composed to large crystals that are easy to see |
| aphanitic | rock that has minerals that are too fine to see |
| intrusive | igneous rocks formed from cooled magma below the surface |
| extrusive | igneous rocks formed from cooled magma that has come to the surface |
| clastic sedimentary rock | formed from fragments and grains from pre-existing rocks...also called detrital (ex. sandstone) |
| chemical sedimentary rock | formed from mineral grains that fall our of solution(precipitate), by evaporation (ex. halite) or by chemical reaction(can also be organic) |
| organic sedimentary rock | fragments of organic material (ex. limestone) |
| compaction | rocks are compacted together and formed by force |
| cementation | minerals fill in spaces between pebbles and other rock particles and form together |
| foliated | you cannot see the crystals |
| non-foliated | you can see the crystals |
| regional metamorphism | rocks are formed by heat and pressure |
| contact metamorphism | rocks are formed by heat of surrounding magma |
| rock cycle | a cycle where a rock changes from one type to another |
| stratification | arrangement of visual layers |