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There are three main strands to my research1) Carbonate sedimentology and diagenesis, relationships of authigenic minerals to oceanography and biogenic activity, and the resource potential of New Zealand glauconite minerals. New Zealand geological development in the Cenozoic through carbonate sedimentology, palaeography and sequence stratigraphy. 2) The response of estuarine environments to coseismic events and the potential record of palaeoseismic activity in estuarine sediments, and their record of human influence and pollutants. 3) The palaeoecology and biogeography of Permian biotas of New Zealand and Australia, and the response of these faunas to the end of the Late Palaeoizoic Ice Age. Systematics and palaeoenvironmental applications of late Palaeozoic bryozoans of Australia and New Zealand. Growth in Palaeozoic bryozoans and their response to variation in water temperature and alkalinity.