Carbonate variations in slope sediments, Kaipara, New Zealand

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Abstract
A series of sediment samples from a selected area of the New Zealand western continental slope show an increase in the percentage of carbonate with depth, and in finer grade sediment with depth and distance from shore. Median diameters of calcareous and detrital components are variable and decrease sharply with depth to 700 m. Below this depth, sediments are dominantly formed of calcareous fragments and coccoliths in the silt and clay grades, with planktonic foraminifera comprising nearly the whole of the remainder of the sediment.