METAMORPHISM Flashcards
Occurs when a rock changes its form into a new one without undergoing melting or disintegration.
METAMORPHISM
Growth of entirely new minerals from the elements released during the breakdown of pre-existing minerals
NEO-CRYSTALLIZATION
Minerals become flattened or elongated without changing either the composition or crustal structure due to their plastic behaviour when exposed to high temperature and pressure.
PLASTIC DEFORMATION
Change in shape and size of mineral without changing the identity or the chemical composition.
RECRYSTALLIZATION
Mineral transforms into a different mineral with a distinct chemical compositions and crystal structures.
PHASE CHANGE
Minerals dissolve at high pressures in the presence of fluids, leading to the migration of dissolved ions and the development of new minerals.
PRESSURE SOLUTION
Intruding magma heats surrounding rocks, causing metamorphism.
CONTACT METAMORPHISM
Plate movements subject rocks to high temperature, pressure, and differential stress, resulting in foliated metamorphic rocks
REGIONAL METAMORPHISM
Cold seawater reacts with basalt on the seafloor due to mid-ocean ridge activity, producing new minerals.
HYDROTHERMAL METAMORPHISM
Increasing pressure and temperature in sedimentary basins lead to metamorphism.
BURIAL METAMORPHISM
High-energy impacts from extraterrestrial objects cause rocks to vaporize and minerals to change structure, as seen with quartz transforming into coesite.
SHOCK METAMORPHISM
Also known as Cataclastic Metamorphism, occurs in fault zones and regions experiencing frequent tectonic activity. Mechanical forces from processes like folding and faulting subject rocks to extreme pressure and stress, causing them to crush and pulverize due to sliding, which generates heat through friction.
DYNAMIC METAMORPHISM
