By What is Cataclastic metamorphism?
Cataclastic Metamorphism: A high-pressure metamorphism resulting from the crushing and shearing of rock during tectonic movement, mostly along faults. Cataclastic metamorphism is generally localized along fault planes (areas of detachment where rocks slide past one another).
Is cataclasite a metamorphic rock?
7.3. Flazer cataclasite is a cataclastic metamorphic rock consisting of angular clasts within a fine-grained matrix formed by brittle fragmentation due to extreme kinetic shearing.
What is Cataclastic deformation?
Cataclastic flow is the main deformation mechanism accommodating large strains above the brittle-ductile transition zone. Deformation is accommodated by the sliding and rolling of fragments within the cataclastic rock. Cycles of cementation and refracturing are generally recognised in such rocks.
What are the 3 main types of metamorphism?
There are three ways that metamorphic rocks can form. The three types of metamorphism are Contact, Regional, and Dynamic metamorphism. Contact Metamorphism occurs when magma comes in contact with an already existing body of rock.
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 is amphibolite rock?
Amphibolite, a rock composed largely or dominantly of minerals of the amphibole group. The term has been applied to rocks of either igneous or metamorphic origin. In igneous rocks, the term hornblendite is more common and restrictive; hornblende is the most common amphibole and is typical of such rocks.
Are metamorphic rocks?
Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
What are Foliations in metamorphic rocks?
Foliated Metamorphic Rocks: (Foliated means the parallel arrangement of certain mineral grains that gives the rock a striped appearance.) Foliation forms when pressure squeezes the flat or elongate minerals within a rock so they become aligned.
What are the 2 main types of metamorphic rocks?
Metamorphic rocks are divided into two categories- Foliates and Non-foliates. Foliates are composed of large amounts of micas and chlorites. These minerals have very distinct cleavage. Foliated metamorphic rocks will split along cleavage lines that are parallel to the minerals that make up the rock.
What is the example of metamorphic rock?
Some examples of metamorphic rocks are gneiss, slate, marble, schist, and quartzite. Slate and quartzite tiles are used in building construction. Marble is also prized for building construction and as a medium for sculpture.