burial metamorphism
Metamorphism due only to the consequences of very deep burial
contact metamorphism
The local metamorphism caused by igneous intrusion to emphasize that it develops adjacent to an intrusion
differential stress
If a material is squeezed unequally from different sides
dynamic metamorphism
At greater depths, rock is so warm that it behaves like soft plastic as shear along the fault takes place. During this process, the minerals in the rock recrystallize
dynamothermal metamorphism
Metamorphism that involves not only heat but also shearing and squashing
exhumation
The process by which deeply buried rocks end up back at the surface
foliation
The repetition of planar surfaces or layers in a metamorphic rock
hydrothermal metamorphism
Hot magma rises beneath the axis of mid-ocean ridges so when cold seawater sinks through cracks down into the oceanic crust along ridges, it heats up and transforms into hydrothermal fluid. This fluid then rises through the crust, near the ridge causing h
index materials
serve to indicate the approximate metamorphic grade of the rock
isograd
The line on a map along which in index mineral first appears is called an isograd
metamorphic aureole
The distinct belt of metamorphic rock that forms around an igneous intrusion
metamorphic facies
A set of metamorphic mineral assemblages indicative of a certain range of pressure and temperature
metamorphic grade
The amount or degree of metamorphic change
metamorphic mineral
New minerals that only grow under metamorphic temperatures and pressures
metamorphic texture
The grains in the rock have grown in place and interlock
metamorphic zones
Regions between two isograds
metamorphism
The process of forming metamorphic rock, new minerals may grow at the expense of old ones, and/or the shape, size and arrangement of grains the rock may change
metasomatism
The process by which a rocks chemical composition changes because of a reaction with hydrothermal fluids
nonfoliated metamorphic rock
Contains minerals that recrystallized or new minerals that grew during metamorphism, but is has no foliation
preferred mineral orientation
As rocks are subjected to differential stress, the internal texture of a rock also changes, typically into platy grains lying parallel to one another
prograde metamorphism
Metamorphism that occurs while temperature and pressure progressively increases
protolith
preexisting rock
retrograde metamorphism
Metamorphism that takes place when temperatures and pressures progressively decrease
shield
Represents the older portion of a continent where extensive areas of Precambrian rock crop out at the ground surface, because overlying younger rock has eroded away
shock metamorphism
When large meteorites slam into the Earth, a vast amount of KE transforms into heat and may be sufficient to melt or even vaporize rock at the impact site.
thermal metamorphism
Th local metamorphism caused by igneous intrusion to emphasize that it develops in response to heat without a change in pressure and without differential stress
vein
Mineral filled crack that cuts across preexisting rock
burial metamorphism
Metamorphism due only to the consequences of very deep burial
contact metamorphism
The local metamorphism caused by igneous intrusion to emphasize that it develops adjacent to an intrusion
differential stress
If a material is squeezed unequally from different sides
dynamic metamorphism
At greater depths, rock is so warm that it behaves like soft plastic as shear along the fault takes place. During this process, the minerals in the rock recrystallize
dynamothermal metamorphism
Metamorphism that involves not only heat but also shearing and squashing
exhumation
The process by which deeply buried rocks end up back at the surface
foliation
The repetition of planar surfaces or layers in a metamorphic rock
hydrothermal metamorphism
Hot magma rises beneath the axis of mid-ocean ridges so when cold seawater sinks through cracks down into the oceanic crust along ridges, it heats up and transforms into hydrothermal fluid. This fluid then rises through the crust, near the ridge causing h
index materials
serve to indicate the approximate metamorphic grade of the rock
isograd
The line on a map along which in index mineral first appears is called an isograd
metamorphic aureole
The distinct belt of metamorphic rock that forms around an igneous intrusion
metamorphic facies
A set of metamorphic mineral assemblages indicative of a certain range of pressure and temperature
metamorphic grade
The amount or degree of metamorphic change
metamorphic mineral
New minerals that only grow under metamorphic temperatures and pressures
metamorphic texture
The grains in the rock have grown in place and interlock
metamorphic zones
Regions between two isograds
metamorphism
The process of forming metamorphic rock, new minerals may grow at the expense of old ones, and/or the shape, size and arrangement of grains the rock may change
metasomatism
The process by which a rocks chemical composition changes because of a reaction with hydrothermal fluids
nonfoliated metamorphic rock
Contains minerals that recrystallized or new minerals that grew during metamorphism, but is has no foliation
preferred mineral orientation
As rocks are subjected to differential stress, the internal texture of a rock also changes, typically into platy grains lying parallel to one another
prograde metamorphism
Metamorphism that occurs while temperature and pressure progressively increases
protolith
preexisting rock
retrograde metamorphism
Metamorphism that takes place when temperatures and pressures progressively decrease
shield
Represents the older portion of a continent where extensive areas of Precambrian rock crop out at the ground surface, because overlying younger rock has eroded away
shock metamorphism
When large meteorites slam into the Earth, a vast amount of KE transforms into heat and may be sufficient to melt or even vaporize rock at the impact site.
thermal metamorphism
Th local metamorphism caused by igneous intrusion to emphasize that it develops in response to heat without a change in pressure and without differential stress
vein
Mineral filled crack that cuts across preexisting rock