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Gabbro (/ˈɡæbroʊ/ GAB-roh) is a
phaneritic (co****-grained and magnesium- and iron-rich),
mafic intrusive igneous rock
formed from the slow
cooling magma...
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Hornblende gabbro is an
intrusive rock
similar to
normal gabbro (
gabbro sensu stricto). In the QAPF
classification it
falls within the
gabbro field, in...
- Nepheline-bearing
gabbro is an
intrusive rock with a
composition intermediate between gabbro and
nepheline gabbro. It is
defined in the QAPF classification...
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Quartz gabbro is an
intrusive rock with a
composition intermediate between gabbro and tonalite. It is
defined in the QAPF
classification as co****-grained...
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Mountain Gabbro Group, the
other being the Glen
Mountain Layered Complex. The
Roosevelt Gabbros are
generally characterized as
biotite gabbros,
which form...
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Baltimore Gabbro Complex is a
hypersthene gabbro with
subordinate amounts of
olivine gabbro, norite,
anorthositic gabbro, and pyroxenite.
Igneous minerals...
- is the
Farmington Gabbro,
located in the
Mocksville Complex. The
Mocksville Complex consist of metamorphosed/unmetamorphosed
gabbros, pyroxenites, hornblendites...
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portion of this unit,
named the Glen
Mountains Layered Complex,
consists of
gabbro,
anorthosite and troctolite.
Recent high-precision
dating yields an age...
- diorites,
whereas ores of
chromium and
platinum are
commonly ****ociated with
gabbros.
Igneous rocks can be
either intrusive (plutonic and hypabyssal) or extrusive...
- (from Gr**** "to pursue") is, in petrology, the name
given to
calcic foidal gabbro, a
plutonic hylocrystalline rock
consisting of augite, olivine,
calcic plagioclase...
