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... > area (en) > Grabungsareal Kategorie > Siedlung > building (en) > Bautechnik > building material (en) > Stein > Obsidian
finds (en) > Fundmaterial > Stein > Obsidian
... > area (en) > Grabungsareal Kategorie > Steinbruch > raw material (en) > Stein > Obsidian
... > finds (en) > Fundtypus > Steinwerkzeug > Rohmaterial > Stein > Obsidian

Preferred term

Obsidian  

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.

Broader concept

Source

  • Encyclopaedia Britannica - https://www.britannica.com/science/obsidian

Editorial note

  • 5.1

In other languages

URI

https://vocabs.acdh.oeaw.ac.at/defcthesaurus/obsidian/3.2

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