Sentence Examples


  • Large areas are overlain with trachyte, basalt, obsidian, tuff and pumice.
  • Like the rest of the cluster, the island is of volcanic origin, with tuff, trachyte and obsidian among its ordinary rocks.
  • The latter are represented by large contemporaneous deposits of tuff and felsitic lava which in the Snowdon District are several thousand feet thick.
  • The rocks on the verge of the Kisumu province of East Africa are mainly volcanic (basalt, tuff, lava, kenyte).
  • In the Rudolf province there and are the basalt, lava, tuff and kenyte of the volcanic mineralogy.

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