Quick Answer: What Are The 3 Main Types Of 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)..

What type of rock is granite?

Consider how granite changes form. Granite is an igneous rock that forms when magma cools relatively slowly underground. It is usually composed primarily of the minerals quartz, feldspar, and mica.

How are metamorphic rocks used?

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). … Schist and slate are sometimes used as building and landscape materials.

What are three important foliated metamorphic rocks?

Slate, schist, and gneiss are three common foliated metamorphic rocks.

What are the 3 main types of sedimentary rocks?

There are three different types of sedimentary rocks: clastic, organic (biological), and chemical. Clastic sedimentary rocks, like sandstone, form from clasts, or pieces of other rock.

What are broken pieces of rock called?

These broken pieces of rock are called sediments. The word “Sedimentary” comes from the root word “Sediment”. Sedimentary rocks are usually formed in water. Streams and rivers carry sediments in their current.

What are contact metamorphic rocks?

Contact metamorphism is the name given to the changes that take place when magma is injected in the surrounding solid rock (country rock). Any type of magma body can lead to contact metamorphism, from a thin dyke to a large stock. … Limestone will be metamorphosed to marble, and sandstone to quartzite.

What is the color of metamorphic rock?

Some of the different colors of marble are white, red, black, mottled and banded, gray, pink, and green. Marble is much harder than its parent rock.

What is a foliation?

Foliation in geology refers to repetitive layering in metamorphic rocks. … More technically, foliation is any penetrative planar fabric present in metamorphic rocks. Rocks exhibiting foliation include the standard sequence formed by the prograde metamorphism of mudrocks; slate, phyllite, schist and gneiss.

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 …

Are metamorphic rocks rare?

Metamorphic rocks are the third great class of rocks. They occur when sedimentary and igneous rocks become changed, or metamorphosed, by conditions underground. … As a result, most of the thousands of rare minerals known to science occur in metamorphic rocks.

What are the main types of metamorphic rocks?

Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble.

What are the 2 basic types 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 is a Nonfoliated metamorphic rock?

Non-foliated metamorphic rocks appear massive or granular without the characteristic parallel mineral grains in foliated rocks. • Non-foliated metamorphic rocks are classified based primarily on their composition. • Marble, quartzite, and soapstone are examples of non-foliated metamorphic rocks.

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.

How do you classify 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 is igneous rock and example?

Igneous rocks are formed from the solidification of molten rock material. … Examples of intrusive igneous rocks are: diabase, diorite, gabbro, granite, pegmatite, and peridotite. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals.

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.