description for a light-colored igneous rock that is poor in iron and magnesium and contains abundant feldspars and quartz
A lava type comprised primarily of feldspar (fel) and silica (s) usually found at continental boundry subduction zones. These are generally thick, pasty lavas with high silicon dioxide levels.
opposite of mafic; "rich in feldspar"; a term applied to magmas or igneous rocks that are silica-rich as rhyolites or granites.
An adjective used to describe a light-colored igneous rock that is poor in iron and magnesium and contains abundant feldspars and quartz.
An igneous rock having abundant light-colored minerals.
An adjective used in reference to igneous rocks that are rich in elements forming feldspar and quartz.
A term used to describe an igneous rock that has a large percentage of light-colored minerals such as quartz, feldspar, and muscovite. Also used in reference to the magmas from which these rocks crystallize. Felsic rocks are generally rich in silicon and aluminum and contain only small amounts of magnesium and iron. Granite and rhyolite are examples of felsic rocks. (See mafic to contrast.)
A mnemonic term derived from "fe" for feldspar, "l" for lenads or feldspathoids, and "s" for silica. The term is applied to light-colored rocks containing an abundance of one or all of these constituents. Also applied to the minerals themselves. The chief felsic minerals are quartz, feldspars, feldspathoids, and muscovite. Compare mafic.
Consisting mostly of silica (more than 65 percent), in the form of quartz and feldspar. Can also be applied in reference only to the feldspars.
a light colored mineral (often quartz or feldspar)
term pertaining to siliceous, feldspar-rich rocks. (usually light colored)
used to describe an igneous rock with abundant light colored minerals like quartz, feldspar and muscovite (e.g. granite).
A term used to describe light-colored igneous rocks with an abundance of light-colored minerals, especially feldspars and quartz. more details....
A mnemonic adjective derived from feldspar + lenad (feldspathoid) + silica + c, and applied to those minerals (quartz, feldspars, feldspathoids, muscovite) as a group. It is the complement of mafic.
An acronym derived from feldspar and silica and used to describe an igneous rock containing light-coloured minerals, such as quartz and feldspar; also applied to those minerals. Rhyolite and granite are felsic rocks. Opposite of mafic. lotation Cells Flotation cells are commonly used in sulfide concentrators to separate the valuable minerals from the waste rock.
Silica rich (65%) igneous rock; generally light colored; rich in quartz, feldspar, and mica. An igneous rock composed chiefly of light-colored feldspar minerals (orthoclase, chiefly, plus some sodium-rich plagioclase), usually accompanied by quartz and some biotite (black) mica.
Term used to describe light-colored rocks containing feldspar, feldspathoids and silica.
Light coloured igneous rocks containing an abundance of feldspars, feldspathoids and silica.
igneous rock rich in light-colored minerals such as silica and feldspar
An igneous rock that has an abundance of light-colored minerals in the matrix such as quartz, feldspars, feldspathoids, muscovite.
An igneous rock having abundant light-coloured minerals and rich in silica
Term used to describe the amount of light-colored feldspar and silica minerals in an igneous rock. Complement of mafic.
An adjective used to describe a rock in which light colored minerals predominates.
As applied to volcanic rocks, this indicates a high silica content; often used interchangeably with rhyolite or dacite.
A term for a rock that contains an abundance of feldspar and silica;
consisting of or having to do with a group of light-colored silicate minerals occurring in igneous rocks. [AHDOS
Felsic is a term used in geology to refer to silicate minerals, magmas, and rocks which are enriched in the lighter elements such as silica, oxygen, aluminium, sodium, and potassium. The term combines the words "feldspar" and "silica." Felsic minerals are usually light in color and have specific gravities less than 3.