plutonik
Plutonik is a term used in geology to describe intrusive igneous rocks that crystallize below the Earth's surface. The standard English spelling for these rocks is plutonic, while plutonik (or similar variants) appears in some languages or older writings as an alternative transliteration. The concept refers to magma that cools slowly underground, forming coarse-grained textures and large mineral crystals.
Intrusive rocks formed in this manner are commonly grouped as plutonic rocks and include granite, diorite,
Key features of plutonic rocks include a phaneritic texture, where crystals are large enough to be seen
Etymology traces to Pluto, the god of the underworld, reflecting the deep, subterranean formation of these rocks.