| Term | Definition |
|---|
| Parent Rock | The rock from which it was formed |
| Metamorphism | Change form that leads to changes in the mineralogy, texture and the composition of the rock |
| Confining Pressure | Forces are applied equally to all directions |
| Differential Pressure | Unequal in different directions |
| Metasomatism | A change in the overall composition in the surrounding rock |
| Texture | Used to describe the size,shape and the arrangement of grains within a rock |
| Foliation | Refers to any planar arrangement of minerals grains or structural features |
| Rock Cleavage | Closely spaced planar surfaces along which a rock split into thin, tabular slabs when hit with a hammer |
| Slaty Cleavage | Excellent splitting properties |
| Schistosity | Minerals under extreme temperatures, when platy minerals grow large enough to be discernible with the unattainable eye |
| Gneissic Texture | Rocks with a banded appearance |
| Nonfoliated | Not experiencing a foliated texture |
| Porphyblastic Textures | Develop in wide range of rock types and mineral in the parent rock recrystallize to form new minerals |
| Contact/Thermal Metamorphism | rocks surrounding a molten igneous body are "baked" |
| Aureole | altered rocks occur in this zone |
| Hydrothermal Metamorphism | Chemical Alteration |
| Hydrothermal Solutions | Ion rich fluids |
| Regional Metamorphism | Most metamorphic rocks are produced |
| Burial Metamorphism | occurs with very thick accumulation of sedimentary strata in a subsiding basin |
| Impact Metamorphism | when high speed projectiles called meteorites strikes earth's form |
| Index Minerals | is used in geology to determine the degree of metamorphism a rock has experienced |
Combine with other sets
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