Angaben zum Begriff
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Bevorzugte Bezeichnung
obsidian (en)
Definition
- Obsidian, natural glass of volcanic origin that is formed by the rapid cooling of viscous lava. Obsidian is extremely rich in silica, low in water, and has a chemical composition similar to rhyolite.
Oberbegriff
- stone (en)
Quelle
- Encyclopaedia Britannica - https://www.britannica.com/science/obsidian
Bearbeitungshinweis
- 5.1
URI
https://vocabs.acdh.oeaw.ac.at/defcthesaurus/obsidian/3.2
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