Jan 31, 2024 · Learn about igneous rocks in geology, including their origin, properties, and classification. Get examples and identification tips.

Photographs and descriptions of intrusive and extrusive igneous rocks with photos and links to detailed articles by Geology.com

Igneous rock (igneous from Latin igneus 'fiery'), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the …

Feb 17, 2023 · Igneous rocks are of two main categories based on where the molten rock solidifies. They are named and described below. Extrusive or volcanic igneous rocks are …

Nov 8, 2023 · The diagram below shows the classification of intrusive igneous rocks in Blue Ridge Parkway and the some of the different types of intrusive rocks beyond the three main types.

Dec 24, 2025 · This results in two groups: (1) plutonic intrusive igneous rocks that solidified deep within the crust and (2) volcanic, or extrusive, igneous rocks formed at Earth’s surface.

Igneous rocks form through the cooling of magma and lava. This comprehensive guide explains their types, classification, properties, textures, and geological formation in a clear scientific way.

Oct 19, 2023 · The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged …

Describe the properties of some common types of igneous rocks. Relate some common uses of igneous rocks. Igneous rocks form when molten material cools and hardens. They may form …

An igneous rocks chart showing the chemical composition, examples, and textures of different types of igneous rocks, such as granite, basalt, andesite, and rhyolite.