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The world's largest known dacite flow is the Chao dacite dome complex, a huge coulée flow-dome between two volcanoes in northern Chile. This flow is over 14 kilometres (8.7 mi) long, has obvious flow features like pressure ridges, and a flow front 400 metres (1,300 ft) tall (the dark scalloped line at lower left). [ 15 ]
Lava domes are common features on volcanoes around the world. Lava domes are known to exist on plate margins as well as in intra-arc hotspots, and on heights above 6000 m and in the sea floor. [1] Individual lava domes and volcanoes featuring lava domes are listed below.
Big Southern Butte is the largest and youngest (300,000 years old) of three rhyolitic domes formed over a million years near the center of the Eastern Snake River Plain in the U.S. state of Idaho. [5] It is one of the largest volcanic domes on earth. [4]
During Sugar Bowl time, the volcano first erupted quietly to produce a dome, then erupted violently at least twice producing a small volume of tephra, directed-blast deposits, pyroclastic flows, and lahars. [32] East Dome, a small hypersthene-homblende dacite dome on the east slope of the volcano, was likely formed around the Sugar Bowl period ...
The volcanic activity here is related to the tectonic movements of this intersection. [24] NASA used the caldera in October to November 1964 and again in September 1966 to geologically train the Apollo Astronauts in recognizing volcanic features, such as ash flow tuffs, pumice air falls, and rhyolite domes. Notable geologist instructors ...
The chain is about 40 km (25 mi) long, and the identified volcanic features, which constitute a volcanic field, [2] include 48 cinder cones, eight lava domes, and 15 maars and explosion craters. [3] Its highest point is the lava dome of Puy de Dôme , located near the middle of the chain, which is 1,465 m (4,806 ft) high. [ 3 ]
An undersea volcano violently erupted in the southwestern Pacific Ocean near the Kingdom of Tonga Saturday, local time, sending shock waves through the atmosphere and triggering tsunami waves ...
The Inyo volcanic chain form much of the southern part of the chain and consist of phreatic explosion pits, and rhyolitic lava flows and domes. The southernmost part of the chain consists of fumaroles and explosion pits on Mammoth Mountain and a set of cinder cones south of the mountain; the latter are called the Red Cones .