The structural position of the Opau Greywackes, Hawke's Bay

Abstract

A structure in the young Tertiaries of the Patoka district, northern Hawke's Bay, is anomalous when the area is compared topographically with districts further north and south. A faulted body consisting of greywackes of probable Jurassic age, has, pushed the Tertiary and its lower Pleistocene cover up, and initiated the local anomalous topography. The action started in Nukumaruan time. The movement had a mild southern component causing, disturbance in the area immediately north of the Opau greywackes.