The collation of whole-rock major and trace element data has led to the development of a method to correlate volcanic ash samples to their source volcanic centres.
Microscopic tephra layers (crypto-tephra) in lake sediments have revealed the longevity of Auckland’s largest and youngest volcano – Rangitoto.
Discrete melt batches that move at different depths and speeds may explain the erratic spatial and temporal pattern of eruptions in the Auckland Volcanic Field (AVF).
Hazard scenarios for monogenetic (clustered) volcanism must cover potentially extended eruption periods and the reawakening of volcanoes as revealed by a study of Rangitoto.
Research on all aspects of monogenetic (small-volume) volcanism has been presented at the Fourth International Maar Conference (4IMC) in Auckland.
The scale of eruption in the Auckland Volcanic Field (AVF) appears to be controlled by the dynamics of the soft area (asthenosphere) of the upper mantle.