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Studies of hydrothermal activity and alteration of the Tokaanu-Waihi area, Taupo Volcanic Zone, New Zealand.
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Paleomagnetism and geochronology of volcanics in the northern North Island, New Zealand.
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Quaternary stratigraphy of the Tauranga Basin.
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Physical volcanology of Pukeonake Scoria Cone, Tongariro Volcanic Centre, central North Island, New Zealand.
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Late Quaternary geology of Whangaparaoa area, East Cape, New Zealand.
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The 1886 basaltic eruption products at Ruawahia Crater, Mt Tarawera.
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The geology of eastern Island Bay, South Wellington.
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Revision of the distribution of Papanetu Tephra, and establishment of its stratigraphic relationship to Karapiti Tephra, central North Island.