The Different Types of Rocks
Earth’s Natural Treasures: the Three Types of Rocks: Sedimentary, Metamorphic, & Igneous
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Sedimentary Rock Metamorphic Rock Igneous Rock
Alisha Anderson March 13, 2010 SCI 110 Introduction to Physical Science Professor Valery Shemetov
Introduction
There are three types of rocks. The three types of rocks are sedimentary, metamorphic, and igneous. Sedimentary rocks are rocks that form when sediments are cemented together. Metamorphic rocks are rocks in which are exposed to high pressure and heat thus causing the material’s properties and structure to change. Metamorphic derives from the Greek language meaning to transform or to change of form. Igneous rocks are rocks that are formed by hot melted materials known as magma. Igneous derive from the Latin language meaning from fire. Igneous rocks have two types; intrusive and extrusive. Sedimentary rocks come into two forms; clastic and chemical.
Igneous Rocks: From Liquid to Solid
Igneous rocks form when hot melted materials cools and becomes a solid rock. This melted material is called magma once it is found beneath the earth’s surface. As mentioned in the introduction, there are two kinds of igneous rocks; extrusive and intrusive. The key difference between these two kinds of rocks is based on where the magma cools. The magma may cool while it’s underneath Earth’s surface or it may break through the earth’s surface at a volcano. In this case, magma becomes lava. Igneous rocks were the earth’s first rocks and made up the early crust. When geologists are searching for rocks that contain iron, igneous rocks would be the
[pic] [pic] [pic]
Sedimentary Rock Metamorphic Rock Igneous Rock
Alisha Anderson March 13, 2010 SCI 110 Introduction to Physical Science Professor Valery Shemetov
Introduction
There are three types of rocks. The three types of rocks are sedimentary, metamorphic, and igneous. Sedimentary rocks are rocks that form when sediments are cemented together. Metamorphic rocks are rocks in which are exposed to high pressure and heat thus causing the material’s properties and structure to change. Metamorphic derives from the Greek language meaning to transform or to change of form. Igneous rocks are rocks that are formed by hot melted materials known as magma. Igneous derive from the Latin language meaning from fire. Igneous rocks have two types; intrusive and extrusive. Sedimentary rocks come into two forms; clastic and chemical.
Igneous Rocks: From Liquid to Solid
Igneous rocks form when hot melted materials cools and becomes a solid rock. This melted material is called magma once it is found beneath the earth’s surface. As mentioned in the introduction, there are two kinds of igneous rocks; extrusive and intrusive. The key difference between these two kinds of rocks is based on where the magma cools. The magma may cool while it’s underneath Earth’s surface or it may break through the earth’s surface at a volcano. In this case, magma becomes lava. Igneous rocks were the earth’s first rocks and made up the early crust. When geologists are searching for rocks that contain iron, igneous rocks would be the