Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Low-latitude Plio-Pleistocene temporal abundance variations in the radiolarian Cycladophora davisiana Ehrenberg: stratigraphic and palaeoceanographic significance
Haslett, S.K.; Funnell, B.M. (1998). Low-latitude Plio-Pleistocene temporal abundance variations in the radiolarian Cycladophora davisiana Ehrenberg: stratigraphic and palaeoceanographic significance, in: Cramp, A. et al. Geological evolution of ocean basins: results from the Ocean Drilling Program. Geological Society Special Publication, 131: pp. 83-89. https://dx.doi.org/10.1144/GSL.SP.1998.131.01.06
In: Cramp, A. et al. (1998). Geological evolution of ocean basins: Results from the Ocean Drilling Program. Geological Society Special Publication, 131. Geological Society: London. ISBN 1-86239-003-7. XI, 323 pp.
In: Hartley, A.J. et al. (Ed.) Geological Society Special Publication. Geological Society of London: Oxford; London; Edinburgh; Boston, Mass.; Carlton, Vic.. ISSN 0305-8719; e-ISSN 2041-4927, meer
|
| Trefwoorden |
Earth sciences > Geology > Stratigraphy
Palaeo studies > Oceanography > Palaeoceanography
Cycladophora davisiana Ehrenberg, 1861 [WoRMS]
|
| Auteurs | | Top |
- Haslett, S.K.
- Funnell, B.M.
|
|
|
| Abstract |
The abundance variation of the radiolarian Cycladophora davisiana was recorded throughout the Plio-Pleistocene Olduvai Time-slab of Ocean Drilling Program (ODP) Sites 677, 709, 847, 850 and 851, in the equatorial Pacific and Indian Oceans. Data were plotted on independently erected timescales. Twelve peak-abundance events were recognized, although not all events were recognized at all the sites. Most of the events, where they are recorded at different sites, were synchronous. However, events recorded at Site 709 in the Indian Ocean were found to be approximately 15 ka older than those events recorded at Pacific sites. This age difference may be due to either diachronous C. davisiana events or a slight inaccuracy in the erected timescale for ODP Site 709 compared with those of the eastern Pacific. The previously demonstrated synchroneity of C. davisiana events in the Late Quaternary leads us to believe that the ODP Site 709 timescale may be inaccurate. Thus, recognition of correlatable C. davisiana events in the equatorial Pacific and Indian Oceans permits the further evaluation and fine-tuning of high-resolution timescales, enabling accurate comparisons to be made of sediment sequences on a regional, and possibly oceanic and interoceanic scale. Of the 12 C. davisiana events recognized, only one event occurred at all the investigated sites. This event occurred at c.1.8 Ma and immediately above the internationally defined Pliocene-Pleistocene boundary, and may thus prove to be a new useful biostratigraphic marker for the Tertiary/Quaternary boundary. C. davisiana is primarily characteristic of high-latitude water masses, therefore the cyclical abundance peaks of this species noted at the low-latitude sites investigated here, represent the injection of deep cold water of high-latitude origin. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
