• Andesite rock


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1.A gray, finegrained volcanic rock Andesite consists mainly of sodiumrich plagioclase feldspar and one or more mafic minerals such as biotite, hornblende, or pyroxene It often contains small, visible crystals phenocrysts of plagioclase

2.Andesite contains vast deserts and suffers from an unstable, earthquake prone surface Weather Since there is little water on Andesite, it rarely rains Andesite has streamfilled skies with thick black clouds filling the atmosphere Notable Inhabitants Basalt; Etymology Andesite's name comes from a volcanic rock, andesite

3.Andesite Extrusive Ingeous Rock2 Unpolished Rock Specimens by OnlineScienceMall $399 $ 3 99 + $512 shipping 5 out of 5 stars 2 Product Description Andesite is an extrusive igneous, volcanic rock, which means that unlikeAndesite Extrusive Ingeous Rock10 Unpolished Rock Specimens

4.Andesite Andesite is an extrusive rock intermediate in composition between rhyolite and basalt Andesite lava is of moderate viscosity and forms thick lava flows and domes The word andesite is derived from the Andes Mountains in South America, where andesite is common

5.Dacite, volcanic rock that may be considered a quartzbearing variety of andesite Dacite is primarily associated with andesite and trachyte and forms lava flows, dikes, and sometimes massive intrusions in the centres of old volcanoes

6.Andesite is the most common volcanic rock after basalt It is porphyritic, that is, consists of coarse crystals phenocrysts embedded in a granular or glassy matrix groundmass Having a silica content of 57%, it is in the intermediate category 52 66% silica of the silicic mafic scale

7.L'andsite est une roche volcanique, de composition intermdiaire et gnralement de couleur griseAppartenant la srie magmatique calcoalcaline, elle est caractristique du volcanisme des zones de subduction convergence L'andsite, comme la plupart des roches volcaniques, prsente une structure microlitique Les andsites sont souvent riches en phnocristaux de feldspaths

8.Andesite is an extrusive igneous rock that has a porphyritic texture This rock is formed from molten magma, which has medium viscosity Read this ScienceStruck article to know the facts, origin, formation, and properties of andesite rocks

9.Andesite Andesite is a volcanic rock similar to basalt only lighter in color and containing less iron and magnesium than basalt Often containing phenocrysts large conspicuous crystals, Andesite is a host rock for Andesine, a precious gemstone

10.Dacite and andesite are medium in color, and contains medium amounts of dark minerals Rhyolite is the lightest colored volcanic rock Rhyolite contains very few dark minerals, but sometimes, rhyolite cools so fast that it quenches and forms volcanic glass instead of crystallizing

11.Intrusive and Extrusive Rock Classification Basalt, andesite, and rhyolite Basalt, usually the first lava to form, contains a high percentage of ferromagnesian minerals and about 25 to 50 percent silica, making it dark green, gray, or black

12.Porphyritic Andesite: Texture: Porphyritic: Origin: ExtrusiveVolcanic: Chemical Composition: Intermediate: Color: Dark Green: Mineral Composition: SodiumCalcium Plagioclase, Pyroxene, Hornblende: Miscellaneous: Hornblende Phenocrysts in an aphanitic finegrained groundmass: Tectonic Environment: Convergent Boundaryboth Island Arctype

13.Andesite is a dark, finegrained, brown or greyish intermediate volcanic rock which is a commonly found in lava Andesite is available in bluishgrey, grey, pink, yellow colors The streak of a rock is the color of powder produced when it is dragged across an unweathered surface

14.Tag Archives: andesite July 4, 2012 Ancient Technology vs Ancient Aliens:I recently watched Dr Zahi Hawass perform experiments proving that using fire pits to soften the rock allowed it to then be quickly pulverized by workers using stone balls of greater hardness

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