Chapter 6: Metamorphic Rocks Exam
100% Correct!!
Metamorphism - ANSWERSchanges in heat, pressure, and the chemical environment of rocks
geothermal gradient - ANSWERStemperature increases with depth (pressure)
Geobaric gradient - ANSWERSpressure increases with depth
-"normal" geobaric gradient~300-400 bar/km
confining - ANSWERSuniform
directed pressure - ANSWERStension, compression, shear
Metasomatism - ANSWERSmineral reactions due to fluids
Shock metamorphism - ANSWERSmeteorite
Sea floor metamorphism - ANSWERSoccurs at mid-ocean ridges, where intruding magma drives
seawater circulation through extruded basalts
Blueschist - ANSWERSpressure is high and temp is moderate
Gneiss - ANSWERSlight colored rock with coarse bands of light and dark minerals throughout the rock
-banded foliation
-high grade
Migmatite - ANSWERSmixture of igneous and metamorphic rock
100% Correct!!
Metamorphism - ANSWERSchanges in heat, pressure, and the chemical environment of rocks
geothermal gradient - ANSWERStemperature increases with depth (pressure)
Geobaric gradient - ANSWERSpressure increases with depth
-"normal" geobaric gradient~300-400 bar/km
confining - ANSWERSuniform
directed pressure - ANSWERStension, compression, shear
Metasomatism - ANSWERSmineral reactions due to fluids
Shock metamorphism - ANSWERSmeteorite
Sea floor metamorphism - ANSWERSoccurs at mid-ocean ridges, where intruding magma drives
seawater circulation through extruded basalts
Blueschist - ANSWERSpressure is high and temp is moderate
Gneiss - ANSWERSlight colored rock with coarse bands of light and dark minerals throughout the rock
-banded foliation
-high grade
Migmatite - ANSWERSmixture of igneous and metamorphic rock
