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Quinterno, Paula J (1994): Calcareous nannofossils in ODP Sites 135-840 and 135-841 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.802375, Supplement to: Quinterno, PJ (1994): Calcareous nannofossil biostratigraphy: Sites 840 (Tonga Ridge) and 841 (Tonga Trench). In: Hawkins, J; Parson, L; Allan, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 135, 267-284, https://doi.org/10.2973/odp.proc.sr.135.115.1994

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Abstract:
Ocean Drilling Program Leg 135 drilled at two sites on the Tonga Ridge. Calcareous nannofossils recovered at Site 840 on the Tonga Ridge date the sedimentary sequence as late Pleistocene or Holocene (CN15) through late Miocene (CN9) in age. A hiatus occurs in the mid Pliocene. Site 841 in the Tonga Trench yielded a sedimentary sequence with nannofossils from middle Pleistocene Subzone CN14b through the middle or late Eocene Subzones CP14a-CP15b overlying a rhyolitic volcanic basement. Part of the Eocene interval contains the shallow-water nannofossil taxa Braarudosphaera, Micrantholithus, and Pemma. A major unconformity separates lower Oligocene Zone CP 16 from lower middle Miocene Zone CN4 strata.
Project(s):
Coverage:
Median Latitude: -22.670800 * Median Longitude: -175.568200 * South-bound Latitude: -23.346000 * West-bound Longitude: -175.749000 * North-bound Latitude: -22.220000 * East-bound Longitude: -175.297000
Date/Time Start: 1991-01-24T17:00:00 * Date/Time End: 1991-02-10T20:30:00
Size:
5 datasets

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