Sentence Examples


  • All the volcanic rocks of these islands are submarine stratified tuffs which are penetrated here and there by andesite or diabase dikes.
  • The lavas and ashes ejected by these volcanoes consist of liparite, dacite, andesite and basalt.
  • Keechelus andesite series 4000 ft.
  • The rolled crystals of sapphire occur, with garnet and other minerals, in glacial deposits, and have probably been derived from dykes of igneous rocks, like andesite and lamprophyre.
  • At the close of the Eocene period great eruptions of augite-andesite took place from two fissures which ran along the west coast.