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They formed from viscous lava rising in a volcanic vent [16] 250 m (820 ft) wide [11] Obsidian Butte is surrounded by a lava flow, and Mullet Island has a characteristic "onion-skin" foliation. [9] On Red Hill, there is a quarry , [ 17 ] a marina , and a trailer park , [ 18 ] and Obsidian Butte has been extensively quarried, to the point that ...
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.
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.
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).
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 ...
The Mount Edziza volcanic complex is a linear group of volcanoes in northwestern British Columbia, Canada. [8] [9] It is about 65 km (40 mi) long and 20 km (12 mi) wide, consisting of several stratovolcanoes, shield volcanoes, subglacial volcanoes, lava domes and cinder cones.
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Obsidian projectile point.. Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica.Obsidian was a highly integrated part of daily and ritual life, and its widespread and varied use may be a significant contributor to Mesoamerica's lack of metallurgy.