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As the Pacific Plate is shoved and crunched under the South American Plate by sea floor spreading, the water-rich sediments of the sea floor are driven deep into the mantle. The metamorphosis from intense heat and pressure results in a class of rocks called andesites as described in previous remarks.
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What are ways magma are formed?
pressure temperature compstion
Computers can determine the age of an object by .?
Analyizing the compstion of it
Is pumice andesitic?
Not necessarily. Pumice can be andesitic, but it may be rhyolitic or dacitic.
What igneous rocks have a mineral composition between that of granitic and basaltic rocks?
Andesitic igneous rock.
Is andesitic thick?
yes
Is basaltic or andesitic magma hotter?
Basaltic magma is hotter than andesitic magma.
What is the difference of andesitic and andesite?
Andesite is a type of extrusive igneous rock with moderate levels of silica. Andesitic is an adjective used to describe volcanic material with the composition of andesite. For example, andesitic lava will cool to form andesite.
What types of volcanoes are created when andesitic magma erupts?
Andesitic magma will result in the formation of a stratovolcano, also called a composite volcano.
Is basaltic lava less fluid than andesitic lava?
No. Basaltic lava has less silica than andesitic lava which makes it less viscous and so basaltic lava flows more easily than andesitic lava.
What minerals are found in andesitic rocks?
Feldspars, biotite, magnetite, and quartz are found in varying degrees in igneous andesitic rocks.
How does andesitic rise to the surface?
magma rises and cools
What type of lava flows from llaima?
basaltic-andesitic
