0
Igneous rocks are generally classified first on the basis of their formation (and therefore their texture) as intrusive or extrusive. Intrusive rocks are solidified from magma under the surface resulting in a visible crystalline texture, and extrusive igneous rocks are solidified from lava at or near the surface, resulting in a small or nearly invisible crystalline texture.
Igneous rock can additionally be classified by general chemistry composition as felsic, intermediate, mafic, and ultramafic. Felsic rocks are higher in silica and aluminum. Mafic rocks are higher in magnesium and iron.
Elinor McDermott
Add your answer:
Earn +20 pts
What rocks are classified as?
Mantle rock is classified as ultramafic igneous rock.
Which rock type forms from the solidification of magma?
Rock solidified from magma is classified as igneous rock.
How is pumice classified?
Pumice is classified as a felsic, glassy, highly vesicular, extrusive igneous rock.
WHAT ARE Mantle rocks classified as?
Mantle rock is classified as ultramafic igneous rock.
what are igneous rock classified based upon?
Igneous rocks can be classified by their method of formation and by their mineralogy.
Can sandstone be classified as an igneous rock?
No, sandstone is a sedimentary rock.
A rock that forms cooling lava is classified as an?
An extrusive igneous rock.
A rock that forms from cooling lava is classified as an?
An extrusive igneous rock.
What is rock type?
Granite is classified as an intrusive, felsic, igneous rock.
Is graphite igneous sedimentary or metamorphic?
Graphite is a mineral, not a rock that is classified as metamorphic, igneous or sedimentary.
What group of rocks does granite belong to?
Granite is classified as an intrusive igneous rock.
What is same between basaltic and andesitic rock?
Both are classified as igneous rock.
