Volcanoes of the Otahuhu-Manurewa district, Auckland

Abstract

The area described is part of a Pliocene-Pleistocene basin of sedimentation that is bordered north and south by terrains of Waitemata Formation. Three groups of Recent or Sub-Recent Volcanoes are described. Those close to the margins of the basin were dominantly effusive in type; those more remote were wholly phreatic. Evidence is presented that the vents are distributed in a north-trending zone which is shown to be in conformity with a pattern of broader significance in the Auckland volcanic field.