Table of Contents
What are the two most common types of igneous rocks?
Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies. Intrusive Igneous Rocks: Intrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth. Great globs of molten rock rise toward the surface.
What is the most used igneous rock?
granite
One of the most common igneous rocks is granite (Figure 4.1). Granite is used extensively in building materials and making statues. Perhaps you have used a pumice stone to smooth your skin or to do jobs around the house. Pumice is another example of an igneous rock (Figure 4.2).
What is the most common igneous?
Basalt
Basalt and granite are two of the most common igneous rocks found at the earth’s surface. They illustrate the diversity of properties igneous rocks have.
What kind of rock are the igneous rocks?
Three Types of Rock. Rocks fall into these three groups: Igneous , Sedimentary , and Metamorphic. Igneous rocks are formed from melted rock deep inside the Earth.
How are the different types of rocks classified?
Though we could come across different colors, types and looks as far as rocks are concerned, scientists and geologists classify rocks basically into three different types. They are igneous rocks, sedimentary rocks and metamorphic rocks. Igneous rocks are the most commonly found rocks as far as the surface of the earth is concerned.
Which igneous rock is fine-grained and have a lot of pyroxene?
Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene. The specimen shown is about two inches (five centimeters) across. Diorite is a coarse-grained, intrusive igneous rock that contains a mixture of feldspar , pyroxene, hornblende, and sometimes quartz.
What is the color of an extrusive igneous rock?
In general, color is a good clue to the silica content of extrusive igneous rocks, with basalt being dark and felsite being light. Although geologists would do a chemical analysis before identifying andesite in a published paper, in the field they readily call a gray or medium-red extrusive igneous rock andesite.