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6-3 flash cards
Term | Definition |
---|---|
metamorphism | alteration of the composition or structure of a rock by heat, pressure, or other natural agency. |
solid state alterations | solid-state alteration of a protolith. And protoliths is preexisting rocks (undergo slow solid-state changes in texture, mineralogy) |
foliated rocks | slate, phyllite, schist, and gneiss. |
non-foliated rocks | marble, quartzite and hornfels. |
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 | takes place when hot, volatile solutions percolate into and react with the protolith, or the original rock. |
rock cycle | a basic concept in geology that describes transitions through geologic time among the three main rock types |