Sentence Examples


  • The rocks on the verge of the Kisumu province of East Africa are mainly volcanic (basalt, tuff, lava, kenyte).
  • Like the rest of the cluster, the island is of volcanic origin, with tuff, trachyte and obsidian among its ordinary rocks.
  • In the Rudolf province there and are the basalt, lava, tuff and kenyte of the volcanic mineralogy.
  • Tuff and travertine are calcareous deposits found in volcanic districts.
  • The top of the heads of the images is cut flat to receive round crowns made of a reddish vesicular tuff found at a crater about 8 m.