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...

Hornblende gabbro is an intrusive rock similar to normal gabbro (gabbro sensu stricto). In the QAPF classification it falls within the gabbro field, in...

is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic...

Schist (/ˈʃɪst/ SHIST) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily...

silicate minerals plagioclase feldspar (typically andesine), biotite, hornblende, and sometimes pyroxene. The chemical composition of diorite is intermediate...

(/æmˈfɪbəlaɪt/) is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no...

also extends towards hornblende and arfvedsonite. There is not a continuous series between calcic clinoamphiboles, such as hornblende, and low-calcium amphiboles...

granular aggregates of clear green hornblende: in fact the original structure disappears. In Norway scapolite-hornblende rocks have long been known at Ødegården...

feldspar and quartz with scattered darker biotite mica and amphibole (often hornblende) peppering the lighter color minerals. Occasionally some individual crystals...

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...

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...

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...

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...

contains only hornblende, has the same composition as some of the camptonites of the same locality that contain feldspar and hornblende of a different...

circumstances. It has the following mineral assemblages: In metabasites: hornblende + plagioclase ± epidote, garnet, cummingtonite, diopside, biotite In metapelites:...

rock consisting mainly of the amphibole hornblende. Hornblende-rich ultramafic rocks are rare and when hornblende is the dominant mineral phase they are...

Metasomatic albite + hornblende + tourmaline alteration of metamorphosed granite, Stone Mountain, Atlanta...

sometimes present along with the quartz. Biotite, augite, fayalite, and hornblende are common accessory minerals. Due to their high content of silica and...

actinolite and chlorite. This gives way to hornblende, plagioclase, pyroxene, and garnet in the hornblende hornfels facies, which in turn gives way to...

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...

rock Hornblendite – Plutonic rock consisting mainly of the amphibole hornblende Hyaloclastite – Volcaniclastic accumulation or breccia Icelandite – Igneous...

oldest rocks, such as greenlandite (a rock composed predominantly of hornblende and hyperthene), formed 3.8 billion years ago, and nuummite. In southern...

minerals, usually hornblende, pyroxene or a feldspar mineral, and may need to be named after their phenocryst mineral, such as 'hornblende-bearing felsite'...

contains biotite and plagioclase. Vogesite contains hornblende and orthoclase. Spessartite contains hornblende and plagioclase. Monchiquite contains no feldspar...

growth, but rather through the mixture of chalcedony and oxidized iron hornblende. Dendritic agate also displays vegetative features, including fern-like...

subducting slab. Pyroxene hornblende peridotite: Intermediate between pyroxene peridotite and hornblende peridotite Pyroxene hornblende peridotite is found...

58 70 69 H200L30C05 Tree Bark Green 200° 30% 10% 48 75 74 H200L30C10 Hornblende Green 200° 30% 15% 35 78 77 H200L30C15 Malachite Blue Turquoise 200° 30%...

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...

(variety of fluorite) Anyolite (metamorphic rock - zoisite, ruby, and hornblende) Aquamarine (light blue variety of beryl) Argentite (high temperature...

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...