What Is The Characteristics Of Metamorphic Rocks?

What four characteristics determine the type of metamorphic rock?

Factors that Control MetamorphismChemical Composition of the Protolith.

The type of rock undergoes metamorphism is a major factor in determing what type of metamorphic rock it becomes.

Temperature.

Pressure.

Fluids.

Time.

Regional Metamorphism.

Contact Metamorphism.

Hydrothermal Metamorphism.More items….

What are the two types of metamorphic?

There are two major kinds of metamorphism: regional and contact. Regional metamorphism. Most metamorphic rocks are the result of regional metamorphism (also called dynamothermal metamorphism). These rocks were typically exposed to tectonic forces and associated high pressures and temperatures.

What are the characteristics of metamorphic sedimentary and igneous rocks?

Igneous — they form from the cooling of magma deep inside the earth. They often have large crystals (you can see them with the naked eye). Metamorphic — they are formed through the change (metamorphosis) of igneous and sedimentary rocks. They can form both underground and at the surface.

What are the classifications 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.

How can you identify a metamorphic rock?

Look at the texture of the rocks: some metamorphic rocks are layered and others are made up of grains. Quartzite and marble are granular. They do not have layers of material. Schist is a layered metamorphic rock.

What are the 3 main types of metamorphism?

Three types of metamorphism exist: contact, dynamic, and regional. Metamorphism produced with increasing pressure and temperature conditions is known as prograde metamorphism.

What is the example of metamorphic rock?

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 color is a metamorphic rock?

Metamorphic rocks can be many colors. It often depends on the chemical makeup of the source rock which was metamorphosed. Iron-rich rocks, when metamorphosed, will often be reddish or black. Copper-containing rocks may be dull or bright green.

How would you describe foliation in metamorphic rocks?

Foliation in geology refers to repetitive layering in metamorphic rocks. Each layer can be as thin as a sheet of paper, or over a meter in thickness. … Rocks exhibiting foliation include the standard sequence formed by the prograde metamorphism of mudrocks; slate, phyllite, schist and gneiss.

What is the main difference between igneous and metamorphic rocks?

The main difference is that the crystals in an igneous rock is shaped as it crystallized from a melt. The structures in a metamorphic rock are earlier strucures (crystals, sedimentary fragments, etc.) that have been deformed or recrystallized due to heat or pressure, or some chemical change.

What are the five characteristics of metamorphic rocks?

The five basic metamorphic textures with typical rock types are slaty (includes slate and phyllite; the foliation is called “slaty cleavage”), schistose (includes schist; the foliation is called “schistosity”), gneissose (gneiss; the foliation is called “gneissosity”), granoblastic (includes granulite, some marbles and …

What are metamorphic rocks used for?

Quartzite and marble are the most commonly used metamorphic rocks. They are frequently chosen for building materials and artwork. Marble is used for statues and decorative items like vases (Figure).

Why are metamorphic rocks so called?

The word “metamorphic” comes from Greek and means “To Change Form”. The diagram above shows you how the rocks on Earth have been changed continually over time from one rock type to another. This changing of rock types is called the “Rock Cycle”.

What makes metamorphic rocks unique?

The main feature that identifies metamorphic rocks is that they are shaped by great heat and pressure. … Because their mineral grains grew together tightly during metamorphism, they’re generally strong rocks. They’re made of different minerals than other kinds of rocks and have a wide range of color and luster.

What is a Nonfoliated metamorphic rock?

Nonfoliated metamorphic rocks are formed around igneous intrusions where the temperatures are high but the pressures are relatively low and equal in all directions (confining pressure).

What are three characteristics of metamorphic rock?

(g). Characteristics of Metamorphic RocksIntroduction. Metamorphism involves the alteration of existing rocks by either excessive heat and pressure, or through the chemical action of fluids. … Heat and Metamorphism. Heat is an important agent in the metamorphic modification of rock. … Pressure and Metamorphism. … Chemical Action of Fluids. … Types of Metamorphism.

What two features characterize most metamorphic rocks?

What two features characterize most metamorphic rocks? or alternating light and dark mineral bands) are characteristic of most metamorphic rocks.

What is the texture of metamorphic rocks?

TEXTURES Textures of metamorphic rocks fall into two broad groups, FOLIATED and NON-FOLIATED. Foliation is produced in a rock by the parallel alignment of platy minerals (e.g., muscovite, biotite, chlorite), needle-like minerals (e.g., hornblende), or tabular minerals (e.g., feldspars).