Geology (from Ancient Greek γῆ (gê) 'earth' and λoγία (-logía) 'study of, discourse') is a branch of natural science concerned with the Earth and other...

The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological...

In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included...

Engineering geology is the application of geology to engineering study for the purpose of assuring that the geological factors regarding the location,...

In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass...

In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms. Erosion-related: Blowout:...

A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from...

late crystallizing minerals. Essentials of Geology, 3rd Ed, Stephen Marshak, p G-7 Essentials of Geology, 3rd Ed, Stephen Marshak, p G-5 Goldich, Samuel...

Planetary geology, alternatively known as astrogeology or exogeology, is a planetary science discipline concerned with the geology of celestial bodies...

In geology and related fields, a stratum (pl.: strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that...

Flood geology (also creation geology or diluvial geology) is a pseudoscientific attempt to interpret and reconcile geological features of the Earth in...

Historical geology or palaeogeology is a discipline that uses the principles and methods of geology to reconstruct the geological history of Earth. Historical...

A stack or sea stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, formed by wave...

In geology, bedrock is solid rock that lies under loose material (regolith) within the crust of Earth or another terrestrial planet. Bedrock is the solid...

Structural geology is the study of the three-dimensional distribution of rock units with respect to their deformational histories. The primary goal of...

A geologic province is a spatial entity with common geologic attributes. A province may include a single dominant structural element such as a basin or...

making up about 84% of Earth's volume. It is predominantly solid, but in geological time it behaves as a viscous fluid. Partial melting of the mantle at mid-ocean...

fine-grained silicate-rich, generally aphanitic matrix or groundmass. In its non-geologic, traditional use, the term porphyry usually refers to the purple-red form...

Mines & Geology is the head of the Department of Mines & Geology of the Government of Andhra Pradesh. The incumbent Minister of Mines & Geology is Kollu...

In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the...

that display a vesicular texture include pumice and scoria. Glossary of geology See "Elmhurst College Powerpoint via google viewer" Archived October 30...

The United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the...

A geologic map or geological map is a special-purpose map made to show various geological features. Rock units or geologic strata are shown by color or...

Indian peninsula. Basement (geology) Craton Platform (geology) Kearey, P. (2001). The new Penguin dictionary of geology (2nd ed.). London: Penguin. p...

Environmental geology, like hydrogeology, is an applied science concerned with the practical application of the principles of geology in the solving of...

In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in...

Economic geology is concerned with earth materials that can be used for economic and industrial purposes. These materials include precious and base metals...

alluvial fans and likely contain the largest accumulations of gravel in the geologic record. Breccias are similar to conglomerates, but have clasts that have...

Amateur geology or rock collecting (also referred to as rockhounding in the United States and Canada) is the non-professional study and hobby of collecting...

Exploration geology may refer to: Exploration geophysics, a branch of geophysics which uses surface methods to detect or infer geological structures Mineral...