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Mount St Helens has layers of this type of rock as well as Andesite through which several domes of Dacite lava have erupted?
Wiki User
∙ 11y ago
The rock type you're looking for is basalt -- St. Helens contains basalt, andesite, and dacite in the form of lava flows and pyroclastic deposits.
Wiki User
∙ 11y ago
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Which volcanoe have eruptions of andesite and dacite?
Andesite and dacite are produced by stratovolcanoes.
What is the composition of magma of popocatepetl?
A mixture of dacite (65wt% SiO2) and basaltic andesite (53wt% SiO2).
What kind of lava flows from Popocatepetl?
Popocat?petl produces a mixture of andesitic and dacite lava in the current cycle of activity. Andesitic, or Basaltic Andesite, is black volcanic rock that contains 55% silica. Dacite, on the other hand, is an igneous, volcanic rock that has a composition that is between Andesite and Rhyolite.
What type of lava does mount st helens have?
Mt St Helen's eruption of 1980 was a pyrocastic flow diverse lava, ranging from olivine basalt to andesite and dacite). The magma is believed to come from another area laterally located to the east. Magma and rock under the volcano are cool.
What was the lava from Mt St Helen's made out of when it erupted in 1980?
The material erupted in the 1980 eruption of Mount St Helens was of a composition known as dacite. Minerals common in dacite are primarily quartz, potassium feldspar, and albite. However most of the dacite from the 1980 eruption came out as ash and pumice, which are varieties of volcanic glass. Although the chemical components were there, the material cooled to quickly for the minerals to form.
Which volcanoe have eruptions of andesite and dacite?
Andesite and dacite are produced by stratovolcanoes.
What is the difference in composition between a dacite and an andesite?
Dacite is more felsic in composition, containing more silica.
What type of lava does the composite volcano has?
It varies in composition, but is usually andesite, dacite, or rhyolite.
What is the composition of magma of popocatepetl?
A mixture of dacite (65wt% SiO2) and basaltic andesite (53wt% SiO2).
What are some extrusive of igneous rocks?
== == Rhyolite, basalt, pumice, obsidian, andesite, dacite, tuff, welded tuff, scoria.
Does mt st helens erupt andesite rock?
In some cases, yes. However the most recent eruptions have produced dacite.
What are some names of extrusive igneous rocks?
== == Rhyolite, basalt, pumice, obsidian, andesite, dacite, tuff, welded tuff, scoria.
What kind of lava flows from Popocatepetl?
Popocat?petl produces a mixture of andesitic and dacite lava in the current cycle of activity. Andesitic, or Basaltic Andesite, is black volcanic rock that contains 55% silica. Dacite, on the other hand, is an igneous, volcanic rock that has a composition that is between Andesite and Rhyolite.
What type of lava does mount st helens have?
Mt St Helen's eruption of 1980 was a pyrocastic flow diverse lava, ranging from olivine basalt to andesite and dacite). The magma is believed to come from another area laterally located to the east. Magma and rock under the volcano are cool.
What is the mineral composition of andesite?
basalt and dacite, and ranges from 57 to 63% silicon dioxide (SiO2)
What was the lava from Mt St Helen's made out of when it erupted in 1980?
The material erupted in the 1980 eruption of Mount St Helens was of a composition known as dacite. Minerals common in dacite are primarily quartz, potassium feldspar, and albite. However most of the dacite from the 1980 eruption came out as ash and pumice, which are varieties of volcanic glass. Although the chemical components were there, the material cooled to quickly for the minerals to form.
What is dacite and rhyodacite?
Rhyodacite are both intermediate-felsic volcanic rocks. They form from the eruption of highly viscous silica rich magma. In terms of composition dacite is in between andesite and rhyolite while rhyodacite is in between dacite and rhyolite. They are similar rocks, generally erupting explosively but occasionally forming lava domes or very thick lava flows.
