Petrology of the basic rocks of the Tarawera Volcanic Complex

Publisher Website
Google Scholar
Abstract
Basic rocks were included as blocks in the Kaharoa eruption of 1020 A.D. and erupted as a tephra deposit on 10 June 1886. The 1886 lava is primarily aphyric although it does contain a few xenocrysts. The earlier basic rocks, which presumably formed an intrusion before the Kaharoa eruption, contain olivine and augite phenocrysts and many xenocrysts. Sinking of the olivine and augite phenocrysts within this intrusion has formed a pyroxene dolerite, and assimilation of rhyolitic material by the basic magma of the intrusion has formed a series of bytownite dolerites.

This publication has 8 references indexed in Scilit: