Basanite
71Lydian stone — Lydian Lyd i*an, a. [L. Lydius, fr. Lydia, Gr. ?.] Of or pertaining to Lydia, a country of Asia Minor, or to its inhabitants; hence, soft; effeminate; said especially of one of the ancient Greek modes or keys, the music in which was of a soft,… …
72Quartz — Quartz, n. [G. quarz.] (Min.) A form of silica, or silicon dioxide ({SiO2}), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in… …
73SiO2 — Quartz Quartz, n. [G. quarz.] (Min.) A form of silica, or silicon dioxide ({SiO2}), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in… …
74List of rock types — This page is intended as a list of all rock types. NOTOC A : Amphibolite: Andesite: Anorthosite : Anthracite: Aplite: Argillite: Arkose B : Banded iron formation: Basalt: Basanite: Blueschist: Boninite: Breccia C : Carbonatite: Cataclasite: Chalk …
75Phonolite — Aegirine phonolite. Dark prismatic minerals are aegirine phenocrysts. Phonolite is a rare igneous, volcanic (extrusive) rock of intermediate (between felsic and mafic) composition, with aphanitic to porphyritic texture. The name phonolite comes… …
76Tephrite — is an igneous, volcanic (extrusive) rock, with aphanitic to porphyritic texture. Mineral assembly is usually abundant feldspathoids (leucite or nepheline), plagioclase, and lesser alkali feldspar. Pyroxenes (clinopyroxenes) are common accessory… …
77Dunite — Not to be confused with Dunnite. Small volcanic bomb of (black) basanite with (green) dunite Dunite (   …
78Aphanite — (from the Greek αφανης, invisible) is a name given to certain typically dark coloured igneous rocks which are so fine grained that their component mineral crystals are not detected by the unaided eye. This texture results from rapid cooling in… …
79TAS classification — The TAS classification can be used to assign names to many common types of volcanic rocks based upon the relationships between the combined alkali content and the silica content. These chemical parameters are useful, because the relative… …
80Andean Volcanic Belt — Map of the volcanic arcs in the Andes, and subducted structures affecting volcanism The Andean Volcanic Belt is a major volcanic belt along the Andean cordillera in Colombia, Bolivia, Peru, Ecuador, Chile and Argentina. It formed as a resu …
