The following is a list of rock types recognized by geologists. There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or …

Jul 9, 2023 · Learn about the three types of rocks: igneous, sedimentary, and metamorphic. Learn their characteristics and get examples of each type.

Jun 19, 2025 · List of all Igneous, Sedimentary, and Metamorphic Rock Types with Pictures and Links to Specific Articles about each Type of Rock.

Photographs and information for a large collection of igneous, metamorphic and sedimentary rocks. Geology.com

Learn about the three types of rock, and see photo examples of each.

A clear, scientifically grounded overview of what rocks are, how the three major rock types form, and why rock classification matters in geology and engineering.

Dec 29, 2025 · Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form …

The three main rock types are igneous, sedimentary, and metamorphic. Crystallization, erosion and sedimentation, and metamorphism transform one rock type into another or change sediments into rock.

There are 3 types of rocks: igneous, sedimentary and metamorphic and this is how they form.

There are three main groups of rocks: igneous, metamorphic, and sedimentary. ... Igneous rocks form from molten material. If the molten material is beneath the Earth’s surface, it is called magma. If the …