Pertaining to minerals or igneous rocks composed of minerals such as quartz and feldspar that are relatively light in color and density. The word comes from the terms feldspar and silica. Granite is a [..]

1912, from feldspar + silica + -ic.

Describing rock 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.

having to do with igneous rocks that contain mostly feldspars and quartz.

Term used to describe the amount of light-colored feldspar and silica minerals in an igneous rock. Complement of mafic.

light-colored minerals containing quartz and feldspar. Contrast with Mafic. Fen: partially flooded low-lying peatland fed water from upslope. (Fen peat usually comes from decomposing sedges, rushes, and other such plant matter.)

(adj) - having abundant light-colored minerals

A term used to describe light-colored igneous rocks with low magnesium and iron content and which are enriched by lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. Felsic rocks have a specific gravity less than 3 and a high content of minerals such as quartz, orthoclase and pagioclase. The most common felsic rock is granit [..]

A term used to describe light-colored igneous rocks with an abundance of light-colored minerals

A term used to describe light-colored igneous rocks with an abundance of light-colored minerals, especially feldspars and quartz. more details....

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.

Descriptive of a light-coloured igneous rock with an abundance of one or all of feldspar, quartz and feldspathoids.

Light coloured rocks containing an abundance of feldspars and quartz.

describes magma or igneous rock that is rich in feldspars and silica and that is generally light in color

(mineralogy) Enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.