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andesite fine grained intermediate rock in macedonia

Andesite FineGrained Intermediate Rock Andesites are typically medium gray and porphyritic with phenocrysts of white to light gray plagioclase andor black augite hornblende andor biotite Some andesites are reddish and some are vesicular If you find quartz you are probably looking at a rhyolite... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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  • Andesite Igneous Rock Pictures Definition More

    Andesite is a finegrained rock that formed when the magma erupted onto the surface and crystallized quickly Andesite and diorite have a composition that is intermediate between basalt and granite This is because their parent magmas formed from the partial melting of a basaltic oceanic plate This magma may have received a granitic

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  • Andesite Assignment Point

    Andesite Definition Andesite is a gray finegrained volcanic rock Andesite consists mainly of sodiumrich plagioclase and one or more mafic minerals such as biotite hornblende or pyroxene It often contains small visible crystals phenocrysts of plagioclase It is the finegrained equivalent of diorite

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  • Andesite Rock Properties Composition Formation Uses

    The term ‘porphyric’ refers to the incorporation of large crystals into a finegrained rock The specific gravity of this rock is 25 – 28 It usually occurs in shades of gray However it is lighter in color than basalt It is said that thicker or domeshaped structures are formed The hardness of andesite rocks on the Moh scale is 7 Uses

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  • Andesite Porphyry James Madison University

    A fine grained aphanitic igneous rock medium to dark in color Color is such a poor indicator of rock identification in most cases that it can only be a first approximation Here however the amphibile phenocrysts put this specimen in the intermediate range Return to Classification pdf version Return to Previous Rock

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  • 41 Classification of Igneous Rocks Geosciences LibreTexts

    Andesite is a fine crystalline intermediate extrusive rock It is commonly grey and porphyritic It can be found in the Andes Mountains and in some island arcs see Chapter 2 It is the fine grained compositional equivalent of diorite Mafic Composition Gabbro Vesicular Basalt

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  • Andesite vs Granite Famous Rocks Compare Rocks

    Andesite is a dark finegrained brown or greyish intermediate volcanic rock which is a commonly found in lava Granite is a very hard granular crystalline igneous rock which consists mainly of quartz mica and feldspar and is often used as building stone These rocks are

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  • Geology Quiz Igneous Rock Flashcards Quizlet

    Name Andesite Texture Aphanitic Finegrained Origin ExtrusiveVolcanic Chemical Composition Intermediate Color Medium Gray Mineral Composition Sodium Calcium Plagioclase Hornblende Biotite Tectonic Environment Convergent Boundary both

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  • Chapter 4 Igneous Rocks Flashcards Quizlet

    Intermediate diorite andesite Mafic gabbro basalt Ultramafic peridotite komatiite Dark finegrained brown or grayish volcanic rock Intermediate in composition between rhyolite and basalt Aphanitic texture Finegrained a Few crystals visible b Relatively rapid rate of cooling

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  • ROCKS and how to identify

    rocks but there is a difference They are VERY coarse grained and strictly speaking are not crystallizing out of a magma The coarse grained nature is the result of crystal growth in aqueous solutions rather than in the molten liquid state The resulting freedom of ion motion allows the crystal to grow much larger in a shorter length of time

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