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the three types of rock

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Created on October 20, 2016

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Transcript

the three types of rock

  • sedimentary rock
  • igneous rock
  • metamorphic rock

By.noor hadab

sedimentary

Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as 'clastic' sedimentary rocks); by the accumulation and the consolidation of sediments;

What are the two main types of sedimentary rocks?

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Sedimentary rocks can be divided into two major categories: clastic and sandstone.

igneous

Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form. Examples of intrusive igneous rocks are diorite, gabbro, granite, pegmatite, and peridotite. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals.

How many types of igneous rocks are there?

There are two types of igneous rocks: intrusive and extrusive. Intrusive igneous rocks form within Earth's crust ; the molten material rises, filling any available crevices, into the crust, and eventually hardens. These rocks are not visible until the earth above them has eroded away.

metamorphic

A metamorphic rock is a result of a transformation of a pre-existing rock. The original rock is subjected to very high heat and pressure, which cause obvious physical and/or chemical changes. Examples of these rock types include marble, slate, gneiss, schist

How many different types of metamorphic rocks are there?

There are two basic types of metamorphic rocks. 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.

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the three types of rock

  • sedimentary rock
  • igneous rock
  • metamorphic rock

By.noor hadab

sedimentary

Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as 'clastic' sedimentary rocks); by the accumulation and the consolidation of sediments;

the three types of rock

  • sedimentary rock
  • igneous rock
  • metamorphic rock

By.noor hadab

igneous

Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form. Examples of intrusive igneous rocks are diorite, gabbro, granite, pegmatite, and peridotite. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals.