What Are The Two Types Of Metamorphic Rocks

There are two basic types of metamorphic rocks.

There are two types of metamorphic rocks. Foliated metamorphic rocks are formed from direct exposure to pressure and heat. Metamorphic rock is a type of rock that is made through heat and pressure within the earth. Many of these types of rocks are quite dense and beautiful in their own unique way.

All metamorphic rocks are formed from other rock types. Foliated metamorphic rocks such as gneiss phyllite schist and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure. Slate and marble are examples of metamorphic rocks. Common metamorphic rocks include phyllite schist gneiss quartzite and marble.

Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. 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 at all. Other metamorphic rocks include gneiss schist and quartzite. There are two main types of metamorphic rocks.

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Non foliated metamorphic rocks such as hornfels marble quartzite and novaculite do not have a layered or banded appearance. Amphibolite quartzite marble hornfels etc. The major types of metamorphic rocks are detailed here which include regional contact and mechanical metamorphism. There are two main types of metamorphic rocks.

Despite these uncomfortable conditions metamorphic rocks do not get hot enough to melt or they would become igneous 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 at all. Types of metamorphic rocks. The original rock is subjected to heat temperatures greater than 150 to 200 c and pressure 100 megapascals 1 000 bar or more causing profound physical or chemical change the protolith may be a sedimentary igneous or existing metamorphic rock.

Metamorphic rocks are largely grouped into foliated and non foliated rocks. There are two main types of metamorphic rocks. Some kinds of metamorphic rocks granite gneiss and biotite schist are two examples are strongly banded or foliated.