Lower to middle Miocene calcareous nannofossil events from the Ontong Java Plateau
Cobertura |
MEDIAN LATITUDE: 1.962750 * MEDIAN LONGITUDE: 157.993000 * SOUTH-BOUND LATITUDE: 0.318500 * WEST-BOUND LONGITUDE: 156.625000 * NORTH-BOUND LATITUDE: 3.607000 * EAST-BOUND LONGITUDE: 159.361000 * DATE/TIME START: 1990-02-18T21:00:00 * DATE/TIME END: 1990-03-02T21:00:00 |
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Data(s) |
24/04/1993
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Resumo |
Uppermost Oligocene through middle Miocene calcareous nannofossil events that were considered potentially useful from a biostratigraphic point of view have been investigated from Ocean Drilling Program Sites 806 and 807 in the western equatorial Pacific Ocean. Comparisons have been made to the corresponding events from other equatorial regions and the mid-latitude North Atlantic. In terms of biostratigraphic reliability, defined by the ability of the pertinent species to provide distinctive marker events and synchroneity over geographic distance, the investigated events can be classified into four general categories: The good markers: last occurrence (LO) Sphenolithus ciperoensis, first occurrence (FO) S. delphix, LO S. delphix, FO S. belemnos, LO S. belemnos, FO S. heteromorphus, termination acme (TA) Discoaster deflandrei, and LO Sphenolithus heteromorphus. The poor markers: LO Helicosphaera recta, TA Cyclicargolithus abisectus, LO Triquetrorhabdulus carinatus, and FO Calcidiscus macintyrei. Ecologically controlled markers with regional value: LO Dictyococcites bisectus, LO Helicosphaera ampliaperta, FO Reticulofenestra pseudoumbilica, LO Cyclicargolithus floridanus, and LO Coronocyclus nitescens. The low abundance markers: FO Discoaster druggii, gradational form of Sphenoliths dissimilis/Sphenolithus belemnos, FO Triquetrorhabdulus rugosus, and FO T. rioensis. |
Formato |
application/zip, 2 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.779916 doi:10.1594/PANGAEA.779916 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Fornaciari, Eliana; Backman, Jan; Rio, Domenico (1993): Quantitative distribution patterns of selected Lower to Middle Miocene calcareous nannofossils from the Ontong Java Plateau. In: Berger, WH; Kroenke, LW; Mayer, LA; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 130, 245-256, doi:10.2973/odp.proc.sr.130.009.1993 |
Palavras-Chave | #130-806B; 130-807A; Ageprof dat des; Ageprofile Datum Description; Depth; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Depth bot; Depth top; DRILL; Drilling/drill rig; FO = first occurrence, LO = last occurrence, LCO = last common occurrence; Joides Resolution; Label 2; Leg130; North Pacific Ocean; Ocean Drilling Program; ODP; ODP sample designation; Sample code/label; Sample code/label 2; SampleLabel |
Tipo |
Dataset |