WebHowever, a degassed viscous lava or one that erupts somewhat hotter than usual may form a lava flow. Viscous lavas have two forms of non-pyroclastic eruptions, lava domes and sheeted flows. Lava with low viscosity shows the following types of behavior: It tends to flow easily, forming puddles, channels, and rivers of molten rock. WebMay 6, 2010 · If lava cools slowly and does not move too fast it forms smooth ropy lava called pahoehoe. However, if it cools quickly and moves fast it can tear into clinkery …
Quiz 3 geology lab Flashcards Quizlet
WebDec 12, 2016 · Lastly, andesitic eruptions have some viscosity in the lava flow Andesitic lava can be found in the Andes and other North American mountains. It is high in the rock andesite, which is the most common volcanic rock after basalt. It has course crystals. Andesitic lava flows more readily than rhyolitic lava, but not as easily as basaltic. Web(c) a low silica content and high temperature. (d) a low silica content and low temperature. 6. Compared to andesitic lavas, basaltic lavas tend to be: (a) higher in viscosity and they retain dissolved gases. (b) higher in viscosity but they easily release dissolved gases. (c) lower in viscosity and they retain dissolved gases. holidays \u0026 observance scotland 2024
Lava Types, Composition, Temperature, & Facts Britannica
WebThe effusion rates for historical eruptions of basaltic lava are highly variable, from 0.5 to 5000 m3/sec. Historic flows from Mt. Etna average about 0.5 m3/sec, whereas the fissure-generated flows associated with the Icelandic Laki eruption in 1783 were released at a rate of ~5000 m3/sec. The effusion rates for andesite and dacite are much ... WebApr 11, 2024 · Changbaishan volcano is one of East Asia's most hazardous intraplate volcanoes. The activity of Changbaishan volcano is divided into three stages: the… WebA shield volcano is a type of volcano named for its low profile, resembling a warrior's shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano.Repeated eruptions result in the steady accumulation of broad sheets of … humana corp address louisville ky