Basalts are common aphanitic igneous extrusive (volcanic) rocks. Basalts are composed of minute grains of plagioclase feldspar (generally labradorite), pyroxene. Feldspar minerals can typically be classified as either plagioclase or potassium feldspars basalts are primarily composed of the plagioclases.Tholeiitic basaltic lavas are characterized by calcic plagioclase with augite, pigeonite or hypersthene, and olivine (rarely) as the dominant mafic minerals. Basalt is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava). Quartz and olivine are rare. Rhyolite, always containing quartz and K-feldspar, occurs in the same settings as basalt and andesite but is only common in.
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what texture would be most unlikely to occur in an extrusive igneous rock
C) The extrusive magma cools quickly so the mineral grains do not have time to. texture would be most unlikely to occur in an extrusive igneous rock.Q: Texture would be most unlikely to occur in an extrusive igneous rock? Write your answer.. Submit. Still have questions? magnify glass. Find more answersWhich texture would be most unlikely to occur in an extrusive igneous rock? A) glassy. B) pyroclastic. C) aphanitic. D) phaneritic. CategoriesQuestions. Which of the following igneous rocks exhibit aphanitic texture?. A ______ texture would be most unlikely to occur in an extrusive igneous. 27) A ______ texture would be most unlikely to occur in an extrusive igneous rock. phaneritic. 28) ______ is named for a prominent, volcanic mountain range.
visible quartz and potassium feldspar grains are the main constituents in a
Of the three principal rock types (igneous, sedimentary, and metamorphic), don’t have enough silica to crystallize potassium feldspar, quartz, etc.Q: What are Visible quartz and potassium feldspar grains the main constituents of? Write your answer.. Submit. Still have questions?Visible quartz and potassium feldspar grains are the main constituents in a is related to Geology Exam: Match The Following! Trivia Quiz 29.Answer: t are the constituents of granite. Granite is a common type of felsic intrusive igneous rock that is.I think they are the constituents of granite. Granite is a common type of felsic intrusive igneous rock that is granular and phaneritic in.
what do pumice and obsidian have in common?
It is commonly light gray to blackish-gray in color. It is easily broken and has sharp edges. Like obsidian, pumice is volcanic glass it thus looks glassy (. Pumice is a form of volcanic rock that’s been created through the process of hydrovolcanic eruptions. It has an extremely porous texture and can be used as. 29 Is pumice toxic? 30 Can obsidian be used for countertops? Pumice is a type of volcanic rock that is made up of small pieces of magma that has cooled and. Had it cooled under more pressure, it would have formed a solid glass, or obsidian in fact, if fragments of obsidian are heated in a crucible until they fuse, What do basalt, pumice, and obsidian have in common? · They form on Earth`s surface from the cooling of lava. · They are fine-grained. · Their crystal grains are.