-
Hornblende is a
complex inosilicate series of minerals. It is not a
recognized mineral in its own right, but the name is used as a
general or
field term...
- is
composed predominantly of sodium-rich
plagioclase plus
pyroxene or
hornblende.
Andesite is the
extrusive equivalent of
plutonic diorite. Characteristic...
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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...
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Schist (/ˈʃɪst/ SHIST) is a medium-grained
metamorphic rock
showing pronounced schistosity (named for the rock). This
means that the rock is
composed of...
- also
extends towards hornblende and arfvedsonite.
There is not a
continuous series between calcic clinoamphiboles, such as
hornblende, and low-calcium amphiboles...
- (/æmˈfɪbəlaɪt/) is a
metamorphic rock that
contains amphibole,
especially hornblende and actinolite, as well as
plagioclase feldspar, but with
little or no...
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silicate minerals plagioclase feldspar (typically andesine), biotite,
hornblende, and
sometimes pyroxene. The
chemical composition of
diorite is intermediate...
- cir****stances. It has the
following mineral ****emblages: In metabasites:
hornblende +
plagioclase ± epidote, garnet, ****mingtonite, diopside,
biotite In metapelites:...
- Ferro-ferri-
hornblende is an amphibole-supergroup
mineral with the
formula ☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2. It
contains essential vacancy (☐). It was discovered...
-
oldest rocks, such as
greenlandite (a rock
composed predominantly of
hornblende and hyperthene),
formed 3.8
billion years ago, and nuummite. In southern...
