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Dacite

Dacite (/ˈdeɪsaɪt/) is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz.

Art, Geological context and formation & Distribution

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Geological context and formation

DikeSillMontanaBulgariaMagma
19 related topics

Distribution

IcelandJuan de Fuca RidgeCalc-alkalineTholeiiticIsland arcs
45 related topics

Composition

BiotiteHornblendePyroxeneAugiteEnstatite
16 related topics

Etymology

DaciaRoman EmpireDanube RiverCarpathian MountainsRomania
7 related topics

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Classification
Felsic
Equivalents
Intrusive variant is granodiorite if it contains 10% to 35% potassium feldspar or tonalite if it contains less than 10% potassium feldspar relative to the total feldspar content.
Primary
Plagioclase feldspar, quartz
Secondary
Hornblende, potassium feldspar, biotite, augite, volcanic glass
Texture
Aphanitic or porphyritic

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Overview

Etymology

Composition

Texture

Geological context and formation

Distribution

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Map overview Semantic statistics

Dacite

Nodes109
Edges108
Triples85
Avg. degree1.98
Density0.018349
Components1

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Dacite

Top relations

related to Distribution · 20
Dacite → Aleutians, Andes, Antilles, Cascade Range, Chile, Ecuador, Examples, Fuca Ridge, Guatemala, Heiðarsporður, Iceland, In, Japan, Juan, Mount Batur, Peru, Philippines, South Sandwich Islands, Sunda Arc, Tonga
related to Geological context and formation · 16
Dacite → Accessory, As, Bulgaria, Dacitic, Examples, Fish Canyon Tuff, Helens, La Garita Caldera, Montana, Mount St, Nevertheless, Oceanic, Once, Pyroclastic, The, When
related to Etymology · 14
Dacite → Austrian, Carpathian Mountains, Dacia, Danube River, Franz Ritter, Geologie Siebenbürgens, Guido Stache, Hauer, Moldova, Roman Empire, Romania, The, The Geology, Transylvania
related to Composition · 10
Dacite → However, IUGS, K2O, Na2O, O3, QAPF, Sanidine, The, The TAS, This
related to Texture · 6
Dacite → In, Other, Porphyritic, Sanidine, Subhedral, The
related to Molten dacite magma at Kīlauea · 5
Dacite → At, Dacitic, Kīlauea, The, This
related to Dacite's role in the formation of Archean continental crust · 4
Dacite → Archean, At, The, Today
Classification · 1
Dacite → Felsic
Equivalents · 1
Dacite → Intrusive variant is granodiorite if it contains 10% to 35% potassium feldspar or tonalite if it contains less than 10% potassium feldspar relative to the total feldspar content.
Primary · 1
Dacite → Plagioclase feldspar, quartz

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Important terminology

quartz magma volcanic plagioclase continental crust dacites rock rocks dacitic oceanic hornblende aphanitic porphyritic calc-alkaline texture feldspar biotite composition lava

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
DaciteClassificationFelsic1.00infobox
DaciteEquivalentsIntrusive variant is granodiorite if it contains 10% to 35% potassium feldspar or tonalite if it contains less than 10% potassium feldspar relative to the total feldspar content.1.00infobox
DacitePrimaryPlagioclase feldspar, quartz1.00infobox
DaciteSecondaryHornblende, potassium feldspar, biotite, augite, volcanic glass1.00infobox
DaciteTextureAphanitic or porphyritic1.00infobox
a dike or sillinstance ofGeological context and formationDacite usually forms as an intrusive rock0.80text
talcinstance ofminerals0.80text
serpentineinstance ofminerals0.80text
micainstance ofminerals0.80text
amphiboles break down generating a more sodic meltinstance ofminerals0.80text
Daciterelated to CompositionThe0.60section
Daciterelated to CompositionSanidine0.60section

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