Sedimentology of the Waitemata Group in the Stanley Point - Devonport area, Auckland, New Zealand

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Abstract
This paper presents a further detailed stratigraphic column showing the alternating sequence of sandstones and siltstones of the Lower Miocene Waitemata turbidite sediments. Descriptions of the sedimentary features, current direction indicators, grain size analyses, petrology, and trace fossils are given especially with regard to their use as possible correlation factors. The use of a model relating current direction variation within an expanding lobate turbidity current is discussed, together with its application for determining axial flow direction of the turbidity current and the direction of thickening of the turbidite sandstone. It is concluded that the best possible method of correlating the uniform sequence of unfossiliferous sediments available at present is by means of close spaced detailed stratigraphic columns together with graphs of sandstone-siltstone ratio and bed thickness variations with respect to stratigraphic height.