Igneous rock
Query URLs
https://term.museum-digital.de/md-de/tag/981
- Note
- Igneous rock (igneous from Latin igneus ´fiery´), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava.
The magma can be derived from partial melts of existing rocks in either a planet´s mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive rocks. Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form natural glasses.
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Obsidian, Anschliff
Obsidian ist ein vulkanisches...
Object information
Image: Harzmuseum Wernigerode - CC BY-NC-SA -
Granit (geschliffen)
Granit ist eines der...
Object information
Image: Harzmuseum Wernigerode - CC BY-NC-SA -
Quarzporphyr (Rhyolith)
Quarzporphyr bzw. Rhyolith,...
Object information
Image: Kreismuseum Bitterfeld - CC BY-NC-SA -
Granit
Granit, weiße Färbung durch...
Object information
Image: Kreismuseum Bitterfeld - CC BY-NC-SA -
Felsit-Greisen
Felsit-Greisen aus...
Object information
Image: Saxonia-Freiberg-Stiftung - CC BY-NC-SA
References
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