Distribution of late Neogene age calcareous nannofossils in ODP Hole 111-677A (Table 2), supplement to: Houghton, Simon D (1989): Late Neogene calcareous nannofossil biostratigraphy and paleoceanography of ODP Hole 677A, Panama Basin. In: Becker, K; Sakai, H; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 111, 277-285Simon D Houghton
The calcareous nannofossil assemblages recovered from Site 677A range in age from latest Miocene (NN11) to latest Pleistocene. The consistently high sediment-accumulation rate (mean of 48 m/m.y.) coupled with little dissolution of carbonate has ensured that generally rich, well-preserved coccolith assemblages occur at this site. Exceptions are the Pliocene/Pleistocene boundary sediments, which show evidence of dissolution, and upper Miocene basement sediments, which show evidence of diagenetic overgrowths.The apparent paradox of the occurrence of large numbers...
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