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hornblende
hornblende Min. (ˈhɔːnblɛnd) Also -blend. [a. Ger. hornblende, f. horn horn + blende.] 1. A mineral closely allied to augite, and having as its chief constituents silica, magnesia, and lime. It is a constituent of many rocks, as granite, syenite, and diorite, and has numerous varieties, aluminous an...
Oxford English Dictionary
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Hornblende
Hornblende is a complex inosilicate series of minerals. However, hornblende itself breaks down at very high temperatures. Hornblende alters easily to chlorite, biotite, or other mafic minerals.
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Hornblende Bluffs
The Hornblende Bluffs () are prominent bluffs that rise to , located southeast of Mount Ellery and near the head of Suvorov Glacier, in the Wilson Hills feature was so named by the northern party of the New Zealand Geological Survey Antarctic Expedition, 1963–64, who found the rock here contains the mineral hornblende
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Hornblende gabbro
Hornblende gabbro is an intrusive rock similar to normal gabbro (gabbro sensu stricto). Hornblende gabbro is distinguished from other subtypes of gabbro by having a composition almost entirely of plagioclase and hornblende, with olivine and
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Hornblende Lake
Hornblende Lake is a lake in Thunder Bay District, Ontario, Canada. It is about long and wide, and lies at an elevation of .
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Ferro-ferri-hornblende
Ferro-ferri-hornblende is an amphibole-supergroup mineral with the formula ☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2. It contains essential vacancy (☐).
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Hornblendite
Hornblendite is a plutonic rock consisting mainly of the amphibole hornblende. Hornblende-rich ultramafic rocks are rare and when hornblende is the dominant mineral phase they are classified as hornblendites with qualifiers such as
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Pawdite
In petrology, pawdite is a dark-colored, fine-grained, granular hypabyssal rock composed of magnetite, titanite, biotite, hornblende, calcic plagioclase It is a hornblende–quartz diabase.
References
Subvolcanic rocks
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The Discovery and Study of Mantle‐Derived Dunite Inclusions in ...
The Ca content (214 ppm-818 ppm) and Ti content (15 ppm-137 ppm) in the xenoliths and xenocrysts are similar to those of olivines from the dunite xenoliths, but are much higher than those of ...
www.researchgate.net
Murrieta Hogbacks
On the north half of the hogbacks, by foliated biotite-hornblende tonalite and on the southern half by hornblende gabbro.
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Bojite
Bojite is a variety of gabbro characterized by the presence of plagioclase feldspar and primary hornblende and absence of clinopyroxene typically associated for rocks composed of plagioclase + hornblende and <5% pyroxene.
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Rodges Run (Delaware River tributary)
Geology
Rodges Run rises in a bed of Hornblende Gneiss laid down during the Precambrian, the hornblende is mixed in with labradorite, the grains are about
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Amphibole
Hornblende is widespread in igneous and metamorphic rocks and is particularly common in syenites and diorites. The name was used by to include tremolite, actinolite and hornblende.
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Norbeck Intrusive Suite
Description
Three lithologies were mapped in the Kensington quadrangle by Drake:
medium- to coarse-grained, fairly massive to foliated biotite-hornblende tonalite that contains xenoliths and/or autoliths of more mafic rock
medium-grained, quartz-augite-hornblende metagabbro that forms small bodies within
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Syenogranite
Some syenogranite contain rare idiomorphic amphibole (Fe-hornblende and Fe-edenite), biotite (annite 25%-35%), plagioclase (An3), along with K-feldspar In the Sao Jose do Campestre Massif in Brazil, the syenogranite is a coarse-grained rock composed of microcline, quartz, hornblende, and rare clinopyroxene
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