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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).
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.
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.
The Ngāti Whakaue led a military expedition to the island in 1842, after a tribesman was killed by the Whanau a Tauwhao, a hapu of Ngāi Te Rangi [10] 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 ...
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 ...
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.
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.
Bagana is an active volcanic cone located in the centre of the island of Bougainville, Papua New Guinea, the largest island of the Solomon group. It is the most active volcano in the country, occupying a remote portion of central Bougainville Island. It is one of Melanesia's youngest and most active volcanoes.