Aphanites (adj. aphanitic; from Ancient Greek αφανης (aphanḗs) 'invisible') are igneous rocks that are so fine-grained that their component mineral crystals are not visible to the naked eye [2] (in contrast to phanerites, in which the crystals are visible to the unaided eye).

Sep 6, 2022 · Aphanitic texture describes igneous rocks with small or fine mineral crystals you cannot see or distinguish by the naked eye or a hand lens. Such rocks are fine-grained and …

The meaning of APHANITE is a dark rock of such close texture that its separate grains are invisible to the naked eye.

Aphanitic (a = not, phaner = visible) rocks, in contrast to phaneritic rocks, typically form from lava which crystallize rapidly on or near Earth's surface. When extrusive rocks make contact with the atmosphere they cool quickly, so the minerals do not have time to form large crystals.

Aphanites (adj. aphanitic; from Ancient Greek αφανης (aphanḗs) 'invisible') are igneous rocks that are so fine-grained that their component mineral crystals are not visible to the naked eye (in contrast to phanerites, in which the crystals are visible to the unaided eye).

fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye

Aphanite is a type of volcanic rock characterized by its fine-grained texture and glassy surface. The rock is so fine-grained that most of its mineral constituents are not visible to the naked eye. The term is derived from the Greek word 'aphanes', meaning 'invisible'.

Any fine-grained igneous rock whose components are not distinguishable with the unaided eye; a rock having aphanitic texture.

Aphanites (adj. aphanitic; from Ancient Greek αφανης (aphanḗs) 'invisible') are igneous rocks that are so fine-grained that their component mineral crystals are not visible to the naked eye (in contrast to phanerites, in which the crystals are visible to the unaided eye).

Any fine-grained igneous rock whose components are not distinguishable with the unaided eye; a rock having aphanitic texture. Synonym of: cryptomere, felsite, felsitoid Compare with: …