What are the two main categories of metamorphic texture quizlet?
The two major types of texture in metamorphic rocks are foliated rocks, which indicate an alignment of platy minerals; and nonfoliated (granular) rocks, which have no preferred alignment of minerals (may indicate a lack of platy minerals).
What are the 2 categories of metamorphic rocks?
There are two main types of metamorphic rocks: those that are foliated because they have formed in an environment with either directed pressure or shear stress, and those that are not foliated because they have formed in an environment without directed pressure or relatively near the surface with very little pressure …
What are the two general classifications of metamorphic rocks based on their texture?
Let's review. Metamorphic rocks are classified by their protolith, which is the parent rock or the original, unmetamorphosed rock, and by texture. The texture of a metamorphic rock can be either foliated and appear layered or banded, or non-foliated and appear uniform in texture without banding.
What are 2 examples of metamorphic?
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.
What are the two types of metamorphism quizlet?
Terms in this set (3)
- 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.
What causes foliated metamorphic textures to form?
Foliated Metamorphic Rocks: Foliation forms when pressure squeezes the flat or elongate minerals within a rock so they become aligned. These rocks develop a platy or sheet-like structure that reflects the direction that pressure was applied.
Which is the category of metamorphic rock?
Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble.
What two forces create metamorphic rocks?
The forces responsible for metamorphic rock formation are heat and pressure. Often these occur at convergent boundaries between tectonic plates. As…
What are the main classifications of metamorphic rocks?
There are two main types of metamorphic rocks: those that are foliated because they have formed in an environment with either directed pressure or shear stress, and those that are not foliated because they have formed in an environment without directed pressure or relatively near the surface with very little pressure …
What 2 things determine the type of metamorphic rock you end up with?
Temperature and pressure. Temperature and pressure are important factors in determining the new minerals that form in a metamorphic rock. Different minerals form under different pressure and temperature conditions.
How many types of metamorphic rocks are there?
two main There are two main types of metamorphic rocks: those that are foliated because they have formed in an environment with either directed pressure or shear stress, and those that are not foliated because they have formed in an environment without directed pressure or relatively near the surface with very little pressure …
What are three main types of metamorphism quizlet?
Terms in this set (3)
- 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 of these are types of metamorphism quizlet?
Terms in this set (6)
- 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 are 3 metamorphic textures?
Metamorphic rock textures are foliated, non-foliated, or lineated are described below.
What is a clastic texture?
Clastic texture: grains or clasts do not interlock but rather are piled together and cemented. Boundaries of individual grains may be another grain, cement or empty pore space. Overall rock is generally porous and not very dense.
What are the five basic textures of metamorphic rocks?
The five basic metamorphic textures with typical rock types are:
- Slaty: slate and phyllite; the foliation is called 'slaty cleavage'
- Schistose: schist; the foliation is called 'schistocity'
- Gneissose: gneiss; the foliation is called 'gneisocity'
- Granoblastic: granulite, some marbles and quartzite.
Which are the two agents that are necessary in the formation of metamorphic rocks?
The conditions required to form a metamorphic rock are very specific. The existing rock must be exposed to high heat, high pressure, or to a hot, mineral-rich fluid. Usually, all three of these circumstances are met.
What are the types of metamorphism?
Types of metamorphism
- Contact metamorphism. …
- Contact metamorphic facies. …
- Dynamic metamorphism. …
- Regional metamorphism. …
- High pressure regional metamorphism. …
- Metamorphic belts. …
- Metamorphic belts in Australia. …
- Retrogressive metamorphism.
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.
What are the names textures and compositions of the common metamorphic rocks?
In order of increasing grain size, foliated textures are referred to as SLATY (aphanitic, very fine-grained), PHYLLITIC (aphanitic, fine-grained), SCHISTOSE (phaneritic). The corresponding rock types are called SLATE, PHYLLITE, and SCHIST. These rocks are not normally banded.
What are the two types of sedimentary rocks?
Sedimentary rocks can be organized into two categories. The first is detrital rock, which comes from the erosion and accumulation of rock fragments, sediment, or other materials—categorized in total as detritus, or debris. The other is chemical rock, produced from the dissolution and precipitation of minerals.
What are the main classification of metamorphic rocks?
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.
What two features characterize most metamorphic rocks?
Metamorphic rocks were once igneous or sedimentary rocks, but have been changed (metamorphosed) as a result of intense heat and/or pressure within the Earth's crust. They are crystalline and often have a “squashed” (foliated or banded) texture.
What are the major types of 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 three types of metamorphism?
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.
What are the types of metamorphism quizlet?
Terms in this set (6)
- 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 two factors are critical to the metamorphic process quizlet?
Heat, Pressure (Stress), and chemically active fluids. Why is heat considered the most important aspect of metamorphism? Because heat provides the energy needed to drive the chemical reactions that result in recrystallization of existing minerals and/or the formation of new minerals.
Which is metamorphic texture?
Metamorphic texture is the description of the shape and orientation of mineral grains in a metamorphic rock. Metamorphic rock textures are foliated, non-foliated, or lineated are described below.
What is sedimentary texture?
Sedimentary texture encompasses three fundamental properties of sedimentary rocks: grain size, grain shape (form, roundness, and surface texture (microrelief) of grains), and fabric (grain packing and orientation). Grain size and shape are properties of individual grains. Fabric is a property of grain aggregates.
What are the 3 textures of rocks?
Igneous Rock Textures
- COARSE GRAINED TEXTURE (PHANERITIC), mineral grains easily visible (grains several mm in size or larger)
- B) FINE GRAINED TEXTURE (APHANITIC), mineral grains smaller than 1mm (need hand lens or microscope to see minerals)
- C) PORPHYRITIC TEXTURE (MIXED FINE AND COARSE)