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

Nov 25, 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 …

Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type. Additionally, different classification systems exist for each …

Feb 12, 2024 · Igneous rocks form when molten rock (magma) originating from deep within the Earth solidifies. The chemical composition of the magma and its cooling rate determine the final rock type. …

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.

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

Jun 13, 2025 · Geologists classify all types of rocks into three main categories: igneous rocks, sedimentary rocks and metamorphic rocks.

Can you tell the difference between sedimentary, igneous and metamorphic rocks? Use this series of posters to learn how to classify rocks and tell the difference between them!

Select a rock, and take the appropriate path below to classify the rock. In each of the sections, you will find brief descriptions of TEXTURES and MINERAL COMPOSITIONS, and a classification chart …

Rocks are generally classified into three main categories: igneous, sedimentary, and metamorphic. Each category reflects specific formation processes and environments.