Rock
A common fine-grained extrusive igneous rock, formed where magma erupts and cools quickly at or very near the surface.
Mineralysk, CC0 · CC0-1.0 · source · Derivative: Downscaled to 1000 px wide by the Wikimedia thumbnail service; no cropping, no colour or content alteration.
4 of 4 claims on this page cite at least one registered source. Counts describe how each statement is known, not how likely it is to be true.
Each claim states how it is known and cites its evidence.
Basalt is a common extrusive igneous rock: it forms when magma erupts and cools quickly at or very near the Earth’s surface, leaving a fine-grained texture.
Evidence support: Supported by the cited evidence one source
Evidence: U.S. Geological Survey n.d. Primary authority
Basalt, the iron-rich volcanic rock making up the ocean floor, contains the strongly magnetic mineral magnetite, which gives it measurable magnetic properties.
Evidence support: Supported by the cited evidence 2 sources, multiple sources, independence unknown
Evidence: Kious 1996 Primary authority; Commission on New Minerals, Nomenclature and Classification, International Mineralogical Association 2026 Primary authority
A rock is a solid collection of minerals; rocks are generally made up of two or more minerals mixed through geological processes.
Evidence support: Supported by the cited evidence 2 sources, multiple sources, independence unknown
Evidence: British Geological Survey n.d. Primary authority; U.S. Geological Survey n.d. Primary authority
There are three main classes of rock, classified by how they are sourced and formed: sedimentary, igneous and metamorphic.
Evidence support: Supported by the cited evidence 4 sources, multiple sources, independence unknown
Evidence: British Geological Survey n.d. Primary authority; U.S. Geological Survey n.d. Primary authority; U.S. Geological Survey n.d. Primary authority; U.S. Geological Survey n.d. Primary authority
Zbynek Burival, CC BY-SA 4.0 · CC-BY-SA-4.0 · source · Derivative: Downscaled to 1200 px wide by the Wikimedia thumbnail service; no cropping, no colour or content alteration.
Record last updated 2026-09-06. Corrections follow the published corrections policy; superseded claims are retained, never silently edited.
