Peter F. Ballance, Murray R. Gregory, Graham W. Gibson; Coconuts in Miocene turbidites in New Zealand Possible evidence for tsunami origin of some turbidity currents. Geology ; 9 (12): 592–595. doi: https://doi.org/10.1130/0091-7613(1981)9<592:CIMTIN>2.0.CO;2
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Fossil coconuts are recorded in proximal turbidites of middle Miocene age in eastern North Island, New Zealand. This is apparently the first record of coconuts in turbidites. The rocks can be assigned to a mid-submarine-fan environment and are part of the accretionary prism of the late Cenozoic volcanic arc in northern New Zealand. The climate was marginally tropical. These turbidites may have been formed by the surge of sediment and debris carried offshore by tsunamis.