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Andesite is an extrusive igneous rock found on or near volcanoes that contain intermediate magmas.
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∙ 11y ago
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Does andesite contain little or no quartz?
Correct. Andesite generally does not have a high enough silica content for quartz to form.
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.
Is andesite sandstone?
No. Andesite is a volcanic rock.
What minerals form the rocks diorite and andesite?
the minerals are olivine and pyroxene ..you're welcome
What minerals form the rocks diorite andesite?
the minerals are olivine and pyroxene ..you're welcome
What is the difference between andesite and basalt?
Both andesite and basalt are volcanic rocks. Basalt is denser and generally darker than andesite. It has a lower silica content and more iron and magnesium. It most often forms from pahoehoe or a'a lava flows and occasionally scoria cinders. Andesite forms from more slica-rich material and is often found in the form of ash, pumice, or volcanic bombs. It may also sometimes form block lava flows, which are more viscous that a'a or pahoehoe.
How old is andesite?
Andesite is not any age in particular. Some deposites of andesite may be hundreds of millions of years old. However, since andesite is volcanic, some andesite rocks may only be minutes old.
Is andesite a mineral?
No. Andesite is an extrusive igneous rock.
Is Andesite an igneous?
Yes. Andesite is an extrusive igneous rock.
Is andesite plutonic?
No. It is volcanic. The plutonic equivalent of andesite is diorite.
Is andesite phaneritic or aphanitic?
Andesite may be aphanitic or porphyritic.
Are diorite and andesite similar?
Yes. Diorite and andesite are igneous rocks with the same composition. Andesite is the extrusive equivalent of diorite, which is intruisive.
