Abstract
Abstract The Table Mountain area (N49) is a region of steeply dissected andesitic, rhyolitic, and associated sedimentary deposits belonging to three groups. Andesitic lavas, rudites, and finer sediments of the Coromandel Group were erupted during the lowermost Pliocene. They are conformably overlain by rhyolitic sediments, ignimbrites, and minor lavas of the lower to mid-Pliocene Whitianga Group, mapped as Wainora Formation, undifferentiated Coroglen Subgroup, and Minden Rhyolite Subgroup. Wain ora Formation consists of basal volcorudites and fossiliferous, carbonaceous, lacustrine, epivolcaniclastic sediments. These are conformably overlain by thicker and more extensive pyroclastic sediments and rarer ;gnimbrites of the undifferentiated Coroglen Subgroup. Four domes of Minden Rhyolite were formed towards the end of this pyroclastic phase, hydrothermal alteration was closely associated with their eruption. The last volcanic activity produced the Omahia Andesite intrusion and minor extrusion of flows (mid-...
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