select course grained rock which is composed of quarts and potassium

Full Answer

What type of rock is composed mainly of quartz and potassium feldspar?

rhyolite Select from the list below the coarse-grained rock which is composed mainly of quartz and potassium feldspar. granite The texture of an igneous rock _____.

Which is the fine-grained equivalent of this igneous rock?

Rhyolite is the fine-grained equivalent of this igneous rock. granite Which one of the following is an igneous rock? rhyolite Select from the list below the coarse-grained rock which is composed mainly of quartz and potassium feldspar.

What are the very large crystals of quartz feldspar and muscovite called?

chromite The very large crystals of quartz, feldspar, and muscovite found in pegmatites form from ________. the final crystallizing parts of a magma The minerals gold, silver, and mercury are often found in hydrothermal veins

Which igneous rock has two distinctively different crystal sizes?

This igneous texture is characterized by two distinctively different crystal sizes. Rhyolite is the fine-grained equivalent of this igneous rock. This rock gets its name from a chain of mountains located in South America. Which of the rocks listed below is a popular building stone? The most important mechanical weathering process is?

What is the name of a coarse grain igneous rock composed of quartz and potassium feldspar?

GraniteGranite (/ˈɡrænət/) is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase.

What type of rock has coarse-grained?

intrusive rocksIgneous rocks may be simply classified according to their chemical/mineral composition as felsic, intermediate, mafic, and ultramafic, and by texture or grain size: intrusive rocks are course grained (all crystals are visible to the naked eye) while extrusive rocks may be fine-grained (microscopic crystals) or glass ( ...

What rock contains quartz and has a very coarse texture?

Granite is a coarse-grained, light-colored, intrusive igneous rock that contains mainly quartz, feldspar, and mica minerals. The specimen above is about two inches (five centimeters) across. Peridotite is a coarse-grained intrusive igneous rock that is composed almost entirely of olivine.

What type of igneous rocks are composed of a lot of quartz and potassium feldspar and high in Al and Si?

Igneous rocks crystallize from a cooling silicate melt (magma or lava). They are composed of intergrown crystals of minerals such as quartz, feldspars, micas, amphiboles, pyroxenes, and olivine. Felsic igneous rocks are silica rich and contain abundant potassium feldspar and quartz.

Which igneous rock is coarse grained phaneritic texture with the most quartz?

Granite1: Granite is a classic coarse-grained (phaneritic) intrusive igneous rock. The different colors are unique minerals. The black colors are likely two or three different minerals. If magma cools slowly, deep within the crust, the resulting rock is called intrusive or plutonic.

What are the most common coarse rocks?

Most Common Types of Igneous RocksTypes. There are two kinds of igneous rocks. ... Granite. Granite is a medium to coarse-grained igneous rock that is formed intrusively. ... Basalt. Basalt is one of the most common types of igneous rocks in the world. ... Gabbro. ... Pumice.

What is coarse grained igneous rock?

(a) Said of a crystalline rock, and of its texture, in which the individual minerals are relatively large; specif. said of an igneous rock whose particles have an average diameter greater than 5 mm (0.2 in.).

What igneous rocks contain quartz?

Granite: the most common igneous plutonic rock. Contains essential quartz, plagioclase and alkali feldspar, usually with hornblende and/or biotite and/or muscovite.

Which igneous rock has a vesicular texture and contains the mineral potassium feldspar and quartz?

Pumice is an igneous rock that contains highly vesicular textured surface. It is composed of potassium feldspar, which is pink or white in color, and quartz, which is either white or colorless.

What type of rock is quartz?

Quartz is one of the most common minerals in the Earth's crust. As a mineral name, quartz refers to a specific chemical compound (silicon dioxide, or silica, SiO2), having a specific crystalline form (hexagonal). It is found is all forms of rock: igneous, metamorphic and sedimentary.

What rock is likely to have potassium feldspar quartz and muscovite and have crystals large enough to see with the naked eye?

Granite Rock These rocks, which are primarily formed from continental crust, are high in silica content. The primary minerals found in granite rocks, which are responsible for forming the crystals, include: potassium-plagioclase feldspar.

What is another name for potassium feldspar?

Amazonite (sometimes called "Amazon stone"), a green variety of microcline.

How does glassy igneous rock form?

Glassy igneous rock form when magma cools too fast for mineral grains to grow. Quartz is quite resistant to weathering and is an important component of sand in riverbeds and on beaches. Like most other liquids, water decreases in volume when it freezes. The particles in breccia are primarily silt sized.

Is limestone a biochemical rock?

Most limestone has a biochemical origin. Compaction is most significant as a lithification process for sedimentary rocks composed of sand-sized particles. The single most characteristic feature of sedimentary rocks is strata or beds. The largest quantity of metamorphic rock is produced by regional metamorphism.