Sentence Examples


  • AA'ecv, to split), in petrology, metamorphic rocks which have a fissile character.
  • His chief work was in microscopic petrology, to the study of which he was attracted by the investigations of Dr H.
  • A secondary or false cleavage, less perfect than the true cleavage, may thus be produced (see Petrology, Pl.
  • The chiastolite-slates show elongated, straight-sided crystals with black cores (see Petrology, Pl.
  • The seeds brought home by Banks in 1771 did not succeed, but the plant was introduced by him to the Royal Gardens at Kew in 1789, and was thence liberally distributed in the ground-mass, and these rocks form transitions to the nephelinites (nephelinitoid phonolites) (see Petrology, Plate III.

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