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6-3
Term | Definition |
---|---|
metamorphism | alteration of composition or structure of a rock via structure or temperature |
solid state alterations | the action of going through metamorphism |
foliated rocks | mineral grain that give the appearance of stripes; pressure squeezes flat, elongated minerals within a rock to become aligned |
non-foliated rocks | rocks whose mineral grains do not align |
regional metamorphism | metamorphism affecting rocks over an extensive area as a result of the large-scale action of heat and pressure. |
contact metamorphism | metamorphism due to contact with or proximity to an igneous intrusion. |
hydrothermal metamorphism | Hydrothermal metamorphism takes place when hot, volatile solutions percolate into and react with the protolith, or the original rock |
rock cycle | The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types |