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Learn how rocks are classified based on how they form and their properties. Explore the examples, characteristics, and uses of igneous, sedimentary, metamorphic, and anthropic rocks.
Learn about the types, properties and uses of rocks on Earth and Mars. Explore photos, descriptions and links to more information on geology.com.
Learn about the three main groups of rocks: igneous, sedimentary and metamorphic, and how they are formed by different processes and conditions. See images and descriptions of common rock types and their properties, and how they relate to Earth's history and geology.
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 recognizable and mappable volumes. Rocks are commonly divided into three major classes according to the processes that resulted in their formation. These classes are (1) igneous rocks, which have solidified from ...
Learn about the three types of rocks: igneous, metamorphic, and sedimentary. See pictures and examples of each type and how they form from different processes and materials.
Types of Rocks. There are three basic types of rock: igneous, sedimentary, and metamorphic. Extremely common in the Earth's crust, igneous rocks are volcanic and form from molten material. They ...
Learn about metamorphic rocks, which form from the transformation of other rocks under extreme conditions deep in the Earth's crust. Explore the common examples, processes, properties, and classification of metamorphic rocks.
Learn about the three main types of rocks (sedimentary, igneous, and metamorphic) and how they form and change over time. Explore examples, images, and interactive 3D models of different rocks and their minerals.
Learn about the three main types of rocks (igneous, sedimentary, and metamorphic) and how they are formed and classified. Explore the rock cycle and its significance for understanding Earth's history and processes.
There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming —that are part of the rock cycle. Sedimentary Rocks Sedimentary rocks are formed from pieces of other existing rock or organic material. There are three different types of sedimentary rocks: clastic ...