Sentence Examples


  • The first eruptions piled up huge domes of lavas rich in soda, including the geburite-dacites and sOlvsbergites of Mount Macedon in Victoria, and the kenyte and tephrite domes of Dunedin, in New Zealand.
  • Among the Tertiary volcanic rocks those of acid types (granites, granulites) were the first to appear and are developed latitudinally; rocks of intermediate type (dacites, andesites) characterize the Miocene and early Pliocene periods; while the basic rocks (ophites, elaeolite syenites and basalts) attained their maximum in later Pliocene and Quaternary times.
  • The whole of this consists of tuffs and lavas, andesites prevailing in the west and rhyolites and dacites in the east.
  • The rocks are liparites, dacites, hornblende and pyroxene andesites.
 
 

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