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Types of Rocks
Transcript of Types of Rocks
Examples of extrusive are pumice and basalt.
The process by which sediments harden to form sedimentary rock is called lithification.
The word metamorphic means "Changed From."
Formed when magma cools and hardens.
This process occurs on the earth's surface or underground.
Made up of one or more minerals. Classified based on the way in which they are formed.
Types of Rocks
The exact location of the formation of the rock determines the type of igneous rock it is.
When magma cools and hardens below the Earth's surface, an intrusive igneous rock forms.
Formed under extreme pressure combined with heat over time.
Rocks on earth are broken down by weathering.
The broken down particles are called sediments, carried away by streams and rivers. The particles stick together and form a larger structure.
When magma rises to the surface
of the earth and hardens, it forms
extrusive igneous rocks.
Extrusive- tends to be glassy in texture because their formation
The process of intrusive rock occurs
slowly so these rocks have a grainy
Metamorphic rock can originate not
only as igneous and sedimentary
rock but also to other types of metamorphic rocks.