igneous rocks  search
NTfeldspathoid rocks
 hypabyssal rocks
 peperite
 picrite
 picrite porphyry
 plutonic rocks
 porphyry
 pyrolite
 vitrophyre
 volcanic rocks
RTalkalic composition
 acidic composition
 amygdules
 agglomerate
 autometamorphism
 calc-alkalic composition
 alteration
 andesitic composition
 aphanitic texture
 ash flows
 banded structures
 basaltic composition
 basement
 batholiths
 calcic composition
 chemical prop
SNUsed to describe crystalline rocks of primary origin (list H). Before 1981, beresite was included as a narrower term. See List H.