Diagenesis of siliceous particles in ODP Hole 114-699A, supplement to: Monty, Claude L V; Westall, Francis; van der Gaast, Sjierk (1991): Diagenesis of siliceous particles in subantarctic sediments, Hole 699: possible microbial mediation. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 685-710

Claude L V Monty, Francis Westall & Sjierk van der Gaast
A number of neogenic opaline structures, not previously reported in the literature, as well as other neogenic phases are described from four Oligocene to Pliocene biosiliceous sediment samples from Hole 699A. The possible influence of microbes on the formation or the morphology of some of them is discussed. The samples, which are early Pliocene, early to middle Miocene, and late Oligocene (two) in age, were histologically fixed aboard ship upon retrieval.Investigations of the samples used...
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