- Contact metamorphism—occurs when magma contacts a rock, changing it by extreme heat (Figure 4.14).
- Regional metamorphism—occurs when great masses of rock change over a wide area due to pressure exerted on rocks at plate boundaries.
What are 2 metamorphic rocks?
Common metamorphic rocks include
phyllite, schist, gneiss, quartzite and marble
. Foliated Metamorphic Rocks: Some kinds of metamorphic rocks — granite gneiss and biotite schist are two examples — are strongly banded or foliated.
What are the two types of metamorphism quizlet?
- fault zone metamorphism. TWO ZONES: …
- contact metamorphism. rock near or touching magma. …
- hydrothermal metamorphism. iron-rich fluids circulate through fissures in rock which create chemical alteration. …
- regional metamorphism. …
- burial metamorphism. …
- subduction zone metamorphism.
What is the two metamorphic process?
Equally as significant are changes in chemical environment that result in two metamorphic processes: (1)
mechanical dislocation where a rock is deformed
, especially as a consequence of differential stress; and (2) chemical recrystallization where a mineral assemblage becomes out of equilibrium due to temperature and …
What are the two types of metamorphism differentiate one from the other?
There are two types of metamorphism:
contact metamorphism and regional metamorphism
. … Regional metamorphism is a type of metamorphism where rock minerals and texture are changed by heat and pressure over a wide area or region. Contact and regional metamorphism differ in both the area and pressure involved.
What are the 7 types of metamorphism?
- Regional. …
- Contact (thermal) …
- Hydrothermal. …
- Shock. …
- Dynamic. …
- Metamorphic facies. …
- Metamorphic grades. …
- Recrystallization.
What is difference between regional and contact metamorphism?
Metamorphism is the solid change in minerals and textures in a pre-existing rock (country rock) due to changing pressure / temperature conditions. Conversely, contact metamorphism usually occurs under higher temperature conditions associated with ignorant intrusions on a smaller scale. …
What are the 3 characteristics of metamorphic rocks?
- Classified by texture and composition.
- Rarely has fossils.
- May react with acid.
- May have alternate bands of light and dark minerals.
- May be composed of only one mineral, ex. marble & quartzite.
- May have layers of visible crystals.
- Usually made of mineral crystals of different sizes.
- Rarely has pores or openings.
How are metamorphic rocks classified?
Metamorphic rocks are broadly classified as
foliated or non-foliated
. Non-foliated metamorphic rocks do not have aligned mineral crystals. Non-foliated rocks form when pressure is uniform, or near the surface where pressure is very low. … The other minerals have been crushed and deformed into a fine-grained matrix (Mtx).
What are 3 facts about metamorphic rocks?
The word metamorphic literally means “changed form”.
Slate
, a metamorphic rock, can form from shale, clay or mudstone. The Taj Mahal in India is made entirely of different types of marble, a metamorphic rock. Serpentine is a type of metamorphic rock that originates as the igneous rock periodite.
Which type’s of rock can be metamorphosed quizlet?
Some rocks of this type can be
sandstone
, limestone, and gypsum. Formed when rocks are buried deep within the Earth and the large amounts of heat and pressure change the rock into something new. You can know the rocks are metamorphic when you see wavy bands in the rock. Examples, shale, gneiss, marble, and quartzite.
What are the three types of metamorphism quizlet?
- contact metamorphism. heated by nearby magma increased temperature changes in the composition of the rock., minerals are changed into new minerals.
- regional metamorphism. pressure builds up in rocks that is deep within the earth. …
- burial metamorphism.
Which type of rock is a foliated metamorphic rock quizlet?
Slate, schist, and gneiss
(pronounced ‘nice’) are all foliated metamorphic rocks.
What is the most important factor driving metamorphism?
Heat
as a Metamorphic Agent – The most important agent of metamorphism is heat because it provides the energy to drive the chemical changes that result in the recrystallization of minerals.
What is meant by metamorphism?
Metamorphism is defined as follows:
The mineralogical and structural adjustment of solid rocks to physical and chemical conditions that have been imposed at depths below the near surface zones of weathering and diagenesis
and which differ from conditions under which the rocks in question originated.
What is metamorphic grade?
metamorphism. In metamorphic rock: Regional metamorphism. (Metamorphic grades refer
to the degree and intensity of the metamorphism
: they are determined by the pressure and temperatures to which the rock has been subjected.) Such areas are generally referred to as metamorphic core complexes.
