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Extrusive rock
refers to the mode of
igneous volcanic rock
formation in
which hot
magma from
inside the
Earth flows out (extrudes) onto the
surface as...
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occurs either below the
surface as
intrusive rocks or on the
surface as
extrusive rocks.
Igneous rock may form with
crystallization to form granular, crystalline...
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igneous rock type
similar to
granite Basalt – Magnesium- and iron-rich
extrusive igneous rock ʻAʻā –
Basaltic lava with a
crumpled appearance Pāhoehoe...
- /ˈbæsɔːlt, -əlt/; US: /bəˈsɔːlt, ˈbeɪsɔːlt/) is an
aphanitic (fine-grained)
extrusive igneous rock
formed from the
rapid cooling of low-viscosity lava rich...
- ****emblage is
predominantly quartz, sanidine, and plagioclase. It is the
extrusive equivalent to granite.
Magma with the
composition of
rhyolite is extremely...
- or trap, is any dark-colored, fine-grained, non-granitic
intrusive or
extrusive igneous rock.
Types of trap rock
include basalt, peridotite, diabase,...
- A
cinder is a
pyroclastic material.
Cinders are
extrusive igneous rocks; they are
fragments of
solidified lava.
Cinders are
typically brown, black, or...
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crust by weight.
Feldspars crystallize from
magma as both
intrusive and
extrusive igneous rocks and are also
present in many
types of
metamorphic rock....
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Trachyte (/ˈtreɪkaɪt, ˈtrækaɪt/) is an
extrusive igneous rock
composed mostly of
alkali feldspar. It is
usually light-colored and
aphanitic (fine-grained)...
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within the
crust of the planet. In contrast, an
extrusion consists of
extrusive rock,
formed above the
surface of the crust. Some
geologists use the term...
