Types of Rocks

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by rachelromero24
Last updated 5 years ago

Discipline:
Science
Subject:
Geostudies
Grade:
7

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Types of Rocks

There are three basic types of rock: igneous, sedimentary, and metamorphic

sedimentary

Types of Rocks..

igneous

Facts

•Rocks and stones are naturally occurring solids made up of minerals•When magma cools and solidifies it forms igneous rock•Sediment deposited over time, often as layers at the bottom of lakes and oceans, forms sedimentary rocks.•Extreme pressure and heat over time forms metamorphic rocks.

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metamorphic

Igneous rocks are one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava.

Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water. Sedimentation is the collective name for processes that cause mineral and/or organic particles (detritus) to settle and accumulate or minerals to precipitate from a solution.

Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock is subjected to heat and pressure, causing profound physical and/or chemical change.

•Minerals are naturally occurring substances formed by geological processes. They are usually solid and feature a crystal structure as well as specific physical properties and chemical composition.•A mineral is sometimes made up of just one chemical element but more often it is a compound of two or more.


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