Dec 24, 2025 · Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of magma, which is a hot (600 to 1,300 °C, or 1,100 to 2,400 °F) molten or …

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 …

Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies. Intrusive, or plutonic, igneous rock forms when magma is trapped deep …

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.

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 …

Feb 7, 2013 · Igneous rocks that solidify below the surface are called plutonic (or intrusive) rocks, while those that solidify at or near the surface are called volcanic rocks.

Jul 5, 2025 · Magmatic rocks can be classified from various ways, although their most general classification divides them according to their origin. They have formed inside the lithosphere. …