Sentence Examples


  • His chief work was in microscopic petrology, to the study of which he was attracted by the investigations of Dr H.
  • Here you find articles in the encyclopedia on topics related to petrology.
  • It is, however, a hornblende granite and does not possess the mineralogical composition of the syenites of modern petrology.
  • AA'ecv, to split), in petrology, metamorphic rocks which have a fissile character.
  • IrXivOos, a tile), in petrology, a dark grey or dark brown crypto-crystalline substance which has an almost vitreous lustre, and when pure appears structureless to the unaided eye.