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Petrochemistry of ignimbrites from the central North Island and Coromandel, New Zealand.
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Geochemistry and petrology of the Rotoiti and Earthquake Flat pyroclastic deposits.
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Mineralogy of some igneous rocks from the Kermadec Islands and Taupo Volcanic Zone, New Zealand.
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The Matahina ignimbrite, its evolution including its eruption and post depositional changes.