On this page about Phaneritic:
Phaneritic is a term usually used to refer to igneous rock grain size. It means that the size of grains in the rock are large enough to be distinguished with the unaided eye as opposed to aphanitic (which is too small to see with the naked eye). This texture forms by slow cooling of magma deep underground in the plutonic environment.
Dunite is an igneous, plutonic (intrusive) rock, of ultramafic composition, with phaneritic texture. Mineral assembly is composed typically of > 90% olivine. Dunitic rocks are believed to represent the Earth's mantle. Typically, dunites occur at the base of ophiolite sequences. See also: igneous...
Tonalite is an igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic texture. Mineral assembly is composed typically of plagioclase, more than 20% of quartz and rare alkali feldspar. Amphiboles and pyroxenes are common accessory minerals. Trondhjemite is a variety of tonalite...
grained (phaneritic) Granite Coarse grained and porphyritic Porphyritic granite Fine grained...
Gabbro pegmatite Coarse grained (phaneritic) Gabbro Coarse grained and porphyritic Porphyritic...
Anorthosite is a phaneritic, plutonic, igneous rock characterized by the predominance of plagioclase feldspar (90-100%), and a minimal mafic component (0-10%). It is closely related to the diorites and gabbros, which are all plagioclase feldspars. It differs from the others of this group mainly by...
a phaneritic groundmass should generally be referred to as gabbro. The crustal portions of oceanic...
crystals. Porphyries may be aphanites or phanerites, that is, the groundmass may have invisibly...
rocks which have crystals large enough to be seen by the naked eye are called phaneritic; those with crystals too small to be seen are called aphanitic. Generally speaking, phaneritic implies an... rocks may be classified as pegmatic (very large grains), phaneritic (only large grains), porphyritic...