The Most Common Extrusive Igneous Rock Is Granite

What is an extrusive igneous rock.

The most common extrusive igneous rock is granite.

The best known igneous rock. How to igneous rocks form. Typically buff to pink or light gray in color. Basalt basalt extrusive rock and granite intrusive rock are two of the most common igneous rock types on the earth and cover most of the igneous deposits on the planet.

Some cool so quickly that they form an amorphous glass. Extrusive igneous rocks erupt onto the surface where they cool quickly to form small crystals. One of the best known and most abundant igneous rocks. These rocks include andesite basalt dacite obsidian pumice rhyolite scoria and tuff.

Granite is the best known igneous rock. Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite. Pumice obsidian andesite rhyolite and basalt. Gabbro is a usually coarse grained igneous rock composed chiefly of pyroxene calcium rich plagioclase feldspar and olivine.

10 20 quartz roughly 50 potassium feldspar. Small amounts of 10 dark silicates. Its principal minerals are feldspars quartz and mica. Small because of the rapid cooling time.

Granite is a coarse grained igneous rock composed mostly of potassium and sodium rich feldspars. Extrusive fine grained aphanitic equivalent of granite. Either when they cool very slowly deep within the earth or when magma cools rapidly at the earth s surface. What is the most common intrusive igneous rock.

Composed essentially of light colored silicates. Volcanic processes has shaped the extrusive igneous rock formations at these parks. Usually the rocks in deep ocean floors are known to be basaltic in nature while the rocks in the continental mass are granitic in nature. This results in rocks with a very fine grained or even glassy texture.

These include counter tops floor tiles paving stone curbing stair treads building veneer. Many people recognize granite because it is the most common igneous rock found at earth s surface and because granite is used to make many objects that we encounter in daily life. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture. Hot gasses are often trapped in the quenched lava forming bubbles vesicles.