Lava
Query URLs
https://term.museum-digital.de/md-de/tag/28641
- Note
- Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from 800 to 1,200 °C (1,470 to 2,190 °F). The volcanic rock resulting from subsequent cooling is also often called lava.
A lava flow is an outpouring of lava during an effusive eruption. (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows.) The viscosity of most lava is about that of ketchup, roughly 10,000 to 100,000 times that of water. Even so, lava can flow great distances before cooling causes it to solidify, because lava exposed to air quickly develops a solid crust that insulates the remaining liquid lava, helping to keep it hot and inviscid enough to continue flowing.
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Basaltrose
Untermeerisch erkaltete...
Object information
Image: Museum für Naturkunde Chemnitz - CC BY-NC-SA -
Stricklava
Im Gegensatz zum Ausbruch des...
Object information
Image: Museum für Naturkunde Chemnitz - RR-F -
Láva, vulkáni hamu, lapilli
Mai neve: láva, Lelőhely:...
Object information
Image: Viski Károly Múzeum Kalocsa - RR-F
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