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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 .
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.
Mayor Island / Tūhua Native name: Tūhua (Māori) Mayor Island / Tūhua as seen from Mount Maunganui Mayor Island / Tūhua Show map of New Zealand Mayor Island / Tūhua Show map of North Island Geography Location Bay of Plenty, North Island, New Zealand Coordinates 37°17′S 176°15′E / 37.283°S 176.250°E / -37.283; 176.250 Area 13 km 2 (5.0 sq mi) Highest elevation 355 m ...
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).
Obsidian Ridge is a volcanic mountain ridge in northwestern British Columbia, Canada, located on the south side of Artifact Creek at the southeast end of Mount Edziza Provincial Park. It was named on January 2, 1980 by the Geological Survey of Canada for its high quality obsidian .
Obsidian scalpels older than 2100 BC have been found in a Bronze Age settlement in Turkey. [48] In the eastern Mediterranean area the material was used to make tools, mirrors and decorative objects. [49] The use of obsidian tools was present in Japan near areas of volcanic activity. [50] [51] Obsidian was mined during the Jōmon period.
The volcano then erupted at 3:20 p.m., local time, on Wednesday, Sept. 29. In the time the e Hawaii's Kilauea volcano bubbles to life, prompts code red aviation alert
Mayor Island / Tūhua is a peralkaline shield volcano with a caldera partly formed in a large eruption some 7000 years ago. It has exhibited many eruptive styles, and its last eruption may have occurred only 500–1000 years ago. [29] The island's Maori name, Tuhua, refers to the obsidian they found on the island and prized for its sharp ...