Subvolcanic rock

A subvolcanic rock, also known as a hypabyssal rock, is an intrusive igneous rock that is emplaced at medium to shallow depths within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic and plutonic rocks. Subvolcanic rocks include diabase (also known as dolerite) and porphyry. Common examples of subvolcanic rocks are diabase, quartz-dolerite, micro-granite and diorite.^[1]^[2]

References

↑ "Examples of rocks with different names". Retrieved 12 June 2015.
↑ "Igneous rock types - Australian Museum". Retrieved 14 June 2015.

Common igneous rocks classified by silicon dioxide content

Type	Ultramafic <45% SiO₂	Mafic 45–52% SiO₂	Intermediate 52–63% SiO₂	Intermediate–felsic 63–69% SiO₂	Felsic >69% SiO₂

Volcanic rocks: Subvolcanic rocks: Plutonic rocks:	Komatiite, Picrite basalt Kimberlite, Lamproite Peridotite	Basalt Diabase (Dolerite) Gabbro	Andesite Microdiorite Diorite	Dacite Microgranodiorite Granodiorite	Rhyolite Microgranite, Aplite Granite

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Subvolcanic rock

See also

References