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  2. Edziza obsidian - Wikipedia

    en.wikipedia.org/wiki/Edziza_obsidian

    Edziza obsidian found in coastal areas of southeast Alaska. Edziza obsidian is a naturally formed volcanic glass found at the Mount Edziza volcanic complex in northwestern British Columbia, Canada. It occurs in at least four geological formations of the volcanic complex and was widely used by indigenous peoples during the pre-Columbian era.

  3. Volcanism of the Mount Edziza volcanic complex - Wikipedia

    en.wikipedia.org/wiki/Volcanism_of_the_Mount...

    Successive eruptions eventually built the volcanic pile above lake level to form a small temporary island that produced subaerial lava flows and lava fountains. [109] The result of this volcanism was the creation of Pillow Ridge on the northwestern flank of Mount Edziza, so-named for its exposures of pillow lava.

  4. Gyali - Wikipedia

    en.wikipedia.org/wiki/Gyali

    Gyali (Greek: Γυαλί "glass", also spelled Giali or Yali, pronounced ) is a Greek volcanic island in the Dodecanese, located halfway between the south coast of Kos and Nisyros. It consists of rhyolitic obsidian lava domes and pumice deposits (which are mined in huge quantities).

  5. Mayor Island / Tūhua - Wikipedia

    en.wikipedia.org/wiki/Mayor_Island_/_Tūhua

    The island is considered special by Māori (the indigenous people of New Zealand) partly because of the presence of black obsidian, a volcanic glass created by the rapid cooling of silica-rich lava, prized as a cutting tool. The obsidian was called Tūhua by Māori, who called the island by the same name.

  6. Iceland volcano near Reykjavik erupts for 10th time in 3 ...

    www.aol.com/iceland-volcano-near-reykjavik...

    Photos show Icelandic volcano erupting for 10th time in 3 years Lava spurts and flows after the eruption of a volcano in the Reykjanes Peninsula near Grindavik, Iceland, in this handout picture ...

  7. Salton Buttes - Wikipedia

    en.wikipedia.org/wiki/Salton_Buttes

    Before Obsidian Butte was emplaced and thus became available for obsidian production, people in the region used obsidian from the Coso volcanic field; [44] this trend away from Coso towards Obsidian Butte was recognized even before the exact timing of the Obsidian Butte eruption was known. [42] How the magmas are formed is controversial.

  8. Iceland volcano – live: Eruption could happen with just 30 ...

    www.aol.com/iceland-volcano-live-eruption-could...

    Authorities fear the Iceland volcano could erupt with just 30 minutes notice as the country’s Meteorological Office (IMO) warned magma may have reached very high up in the Earth’s crust ...

  9. Obsidian - Wikipedia

    en.wikipedia.org/wiki/Obsidian

    The source of obsidian for cultures inhabiting the territory of and around Greece was the island of Milos; the Starčevo–Körös–Criș culture obtained obsidian from sources in Hungary and Slovakia, while the Cardium-Impresso cultural complex acquired obsidian from the island outcrops of the central Mediterranean.