This map illustrates the distribution of the main types of marine sediment found on the ocean floor around New Zealand. Close to shore, land-derived muds, sands and gravels are dominant. Further from shore, organic sediments formed from the shells of tiny sea creatures become more common. In the very deep ocean basins, clays are present.
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Te Ara - The Encyclopedia of New Zealand
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Source: NIWA – National Institute of Water and Atmospheric Research
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