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...
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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 (redirect from Hornblende schist)
Schist (/ˈʃɪst/ SHIST) is a medium-grained metamorphic rock showing pronounced schistosity (named for the rock). This means that the rock is composed of...
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Andesite (redirect from Hornblende andesite porphyry)
is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic...
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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...
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Scapolite (section Scapolite-hornblende rocks)
granular aggregates of clear green hornblende: in fact the original structure disappears. In Norway scapolite-hornblende rocks have long been known at Ødegården...
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also extends towards hornblende and arfvedsonite. There is not a continuous series between calcic clinoamphiboles, such as hornblende, and low-calcium amphiboles...
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silicate minerals plagioclase feldspar (typically andesine), biotite, hornblende, and sometimes pyroxene. The chemical composition of diorite is intermediate...
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(/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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Metamorphic facies (section Hornblende-hornfels facies)
circumstances. It has the following mineral assemblages: In metabasites: hornblende + plagioclase ± epidote, garnet, cummingtonite, diopside, biotite In metapelites:...
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contains only hornblende, has the same composition as some of the camptonites of the same locality that contain feldspar and hornblende of a different...
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less than 5% each of pyroxene or hornblende. Hornblende gabbro is composed almost entirely of plagioclase and hornblende, with less than 5% each of pyroxene...
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Suvorov Glacier (redirect from Hornblende Bluffs)
and flows east to the Southern Ocean. Mount Steele, Mount Ellery, the Hornblende Bluffs, Heth Ridge and Mount Send are to the west. To the north, near...
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Spruce Pine Mining District (section Hornblende Rocks)
approximate age of the whole district was taken from Sm/Nd dating in the hornblendes, and was found to be from 470 to 450 million years old. This puts the...
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Hornblende Lake is a lake in Thunder Bay District, Ontario, Canada. It is about 1,100 metres (3,609 ft) long and 400 metres (1,312 ft) wide, and lies at...
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actinolite and chlorite. This gives way to hornblende, plagioclase, pyroxene, and garnet in the hornblende hornfels facies, which in turn gives way to...
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rock consisting mainly of the amphibole hornblende. Hornblende-rich ultramafic rocks are rare and when hornblende is the dominant mineral phase they are...
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minerals, usually hornblende, pyroxene or a feldspar mineral, and may need to be named after their phenocryst mineral, such as 'hornblende-bearing felsite'...
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feldspar and quartz with scattered darker biotite mica and amphibole (often hornblende) peppering the lighter color minerals. Occasionally some individual crystals...
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Metasomatic albite + hornblende + tourmaline alteration of metamorphosed granite, Stone Mountain, Atlanta...
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sometimes present along with the quartz. Biotite, augite, fayalite, and hornblende are common accessory minerals. Due to their high content of silica and...
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rock Hornblendite – Plutonic rock consisting mainly of the amphibole hornblende Hyaloclastite – Volcaniclastic accumulation or breccia Icelandite – Igneous...
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subducting slab. Pyroxene hornblende peridotite: Intermediate between pyroxene peridotite and hornblende peridotite Pyroxene hornblende peridotite is found...
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agents of chemical weathering. For example, an experimental study on hornblende granite in New Jersey, US, demonstrated a 3x – 4x increase in weathering...
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oldest rocks, such as greenlandite (a rock composed predominantly of hornblende and hyperthene), formed 3.8 billion years ago, and nuummite. In southern...
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(variety of fluorite) Anyolite (metamorphic rock - zoisite, ruby, and hornblende) Aquamarine (light blue variety of beryl) Argentite (high temperature...
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series Tremolite – Ca2Mg5Si8O22(OH)2 Actinolite – Ca2(Mg,Fe)5Si8O22(OH)2 Hornblende – (Ca,Na) 2–3(Mg,Fe,Al) 5Si 6(Al,Si) 2O 22(OH) 2 Sodium amphibole group...
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typical material; for this reason, the mineral has been known as Labrador hornblende or paulite. Color is often gray, brown, or green, and the luster is usually...
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biotite and hornblende are very common in some lavas; they are surrounded by black rims of magnetite mixed with pale green augite. The hornblende or biotite...
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Blue Ridge Mountains of Virginia. Plagioclase phenocrysts (white) and hornblende phenocryst (dark; intergrown with plagioclase) are set in a fine matrix...
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