Term
| What happens to sediment as it is buried deeper and deeper into the earth? ___, __ and ___. |
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Definition
| sedimentation; diagenesis; metamorphism |
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Term
| Diagenesis and lithification to form ____ rock. |
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Definition
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Term
| Metamorphism to form ____ rock. |
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Definition
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Term
| The changes in mineral composition and texture of a rock subjected to high temperatures and pressures within the Earth? |
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Definition
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Term
| Rock formed by the alteration of preexisting rock (but still in the solid state) by heat, pressure, and/or chemically active fluids? |
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Definition
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Term
| Metamorphism progresses incrementally from ___-grade to ___-grade. |
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Definition
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Term
| During metamorphism the rock must remain essentially ___, but will show signs of partial melting at the ___ grade of ____. |
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Definition
| solid; highest; metamorphism |
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Term
| Agents of Metamorphism ___ temperature, ___ pressure, ___ ___ fluids. |
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Definition
| increased; increased; chemically active |
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Term
| Temperature increases with ___ ___ into Earth. |
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Definition
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Term
| It takes approximately 12 km of burial to reach minimum metamorphic conditions (Time C) is raising the temperature of rocks through ___ ___. |
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Definition
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Term
| When one block of crust is forced over another, the lower one heats to a temperature associated with its new depth is Raising the temperature through ___ ___. |
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Definition
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Term
| Intrusion of magma alters the local geothermal gradient. This metamorphoses adjacent rock and is referred to as contact metamorphism. is Raising temperature through ___ ___. |
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Definition
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Term
| The thermal gradient is increased in the zone of magmatic activity an increased thermal gradient results in higher temperatures at shallower depths is raising temperature through ___ ___. |
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Definition
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Term
| Pressure increases with increased depth in the Earth.? |
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Definition
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Term
| due to the increased load of overlying rock with burial? |
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Definition
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Term
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Definition
| confining and differential |
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Term
due to burial
–Pressure (stress) equal in all directions
–Rock is compressed but not folded and deformed? |
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Definition
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Term
caused by directional tectonic forces
–The forces are greater in one direction than another
–Rock can be folded and deformed? |
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Definition
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Term
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Definition
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Term
| desribes a texture in which planes of minerals formedin response to stress? |
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Definition
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Term
| All rocks near the earths surface contain ___ in the pore spaces and fractures. |
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Definition
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Term
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Definition
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Term
| hydrothermal fluids at shallow depths? |
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Definition
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Term
| Hydrothermal fluid heated by hot magma bodies? |
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Definition
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Term
| Hydrothermal fluid heated by ___ at ___ ___. |
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Definition
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Term
| Metamorphic Environments: Increased temperature and pressure from burial? |
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Definition
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Term
| Metamorphic Environments: Increased pressure during mountain building? |
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Definition
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Term
| Metamorphic Environments: Increased temperature in rock in contact with magma? |
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Definition
| Contact or Thermal metamorphism |
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Term
| Metamorphic Environments: Hot water flows into cooler rock and alters the rock? |
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Definition
| Hydrothermal Metamorphism |
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Term
| Metamorphic Rock Textures is __ or ___. |
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Definition
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Term
| foliated textures include __ cleavage, ___, ___ texture. |
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Definition
| slaty; schistosity; gneissic |
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Term
| foliated is __, minerals ___ into parallel alignment, forms where there is ___ stress. |
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Definition
| layered; recrystallize; diffrential |
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Term
| nonfoliated __ __, mass of __ ___ crysals, found where ___ occurs wothout differential stress. |
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Definition
| no alignment; large interlocking; metamorphism |
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Term
| Rock splits along closely spaced planar surfaces? |
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Definition
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Term
| Platy minerals cause it to have a layered structure? |
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Definition
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Term
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Definition
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Term
The type of metamorphic rock to
form is determined by
•The composition of the___rock
•The ___ of metamorphism |
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Definition
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Term
| The composition of the___ ___is key to determining the type of metamorphic rock will form. |
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Definition
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Term
| Metamorphism can result in a progress in rock compositions from low to high grade? |
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Definition
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Term
| Metamorphism of shale results in a progression of rocks from ___ to ___grade. |
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Definition
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Term
Very fine-grained
•Has slatycleavage breaks easily into flat pieces
•generated from low-grade metamorphism of shale? |
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Definition
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Term
Medium-to coarse-grained
•Platy minerals (mainly micas) predominate
•The term describes the texture? |
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Definition
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Term
| Medium-to coarse-grained•Banded appearance•High-grade metamorphism? |
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Definition
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Term
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Definition
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Term
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Definition
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Term
| The highest grade of metamorphism? |
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Definition
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Term
| ___ bands are non-ferromagnesian minerals. |
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Definition
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Term
| ___ bands are ferromagnesian minerals. |
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Definition
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Term
| lowest melting temperature minerals so melt first and recrystallize as the white bands? |
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Definition
| light bands of ferromagnesian minerals |
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Term
| Have the highest melting temperatures so form dark bands of minerals that did not melt.? |
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Definition
| dark bands of ferromagnesian minerals |
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