Planned maintenance
A system upgrade is planned for 10/12-2024, at 12:00-13:00. During this time DiVA will be unavailable.
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Reworked Jurassic-Neogene calcareous nannofossils in the central Arctic
Responsible organisation
1994 (English)In: Marine Geology, Vol. 119, no 3/4, p. 287-300Article in journal (Refereed)
Abstract [en]
Over 130 different reworked calcareous nannofossil taxa, ranging from the Lower Jurassic to the Neogene, are recorded in Quaternary sediments from the central Arctic Ocean. Species with Mesozoic and Tertiary stratigraphic ranges occur together. This suggests that the reworked specimens are not primarily derived from the local bedrock, but are transported to the central Arctic Ocean from the surrounding shelves and landmasses. Sea ice provides a possible means of transport. The reworked nannofossil assemblages in the Arctic are a result of geologic and climatic developments in the source areas, both during the time of their deposition and during their subsequent erosion and transportation in the Quaternary. Only two specimens restricted to the Lower Jurassic were observed and none restricted to the Middle and Upper Jurassic. The Lower Cretaceous is represented by at least four species restricted to that interval, together with other long ranging taxa. The presence of Micrantholithus speetonensis Perch-Nielsen is the first record of this species outside northwest Europe. The other Lower Cretaceous species observed are all typical of temperate to high latitude assemblages of both the southern and northern hemispheres. The nannofossils reworked from the Upper Cretaceous strata are the dominant component of the assemblages. Nephrolithus corystus Wind is recorded in the northern hemisphere for the first time. Some of the distinctive high latitude species present in the southern hemisphere have not been observed in the Arctic. Helioliths, discoasters and sphenoliths indicate relatively warm surface water conditions in the Arctic-subarctic areas during the Paleocene and Eocene.
Place, publisher, year, edition, pages
1994, 3 April 2003. Vol. 119, no 3/4, p. 287-300
Keywords [en]
nannofossils, fossils, Arctic Ocean Expedition 1991, SWEDARCTIC 1991, Oden-91, Arctic, Arctic Ocean
Identifiers
URN: urn:nbn:se:polar:diva-520DOI: 10.1016/0025-3227(94)90186-4OAI: oai:DiVA.org:polar-520DiVA, id: diva2:568652
Note

Source: Polardok by Swedish Polar Research Secretariat

Available from: 2012-11-15 Created: 2012-11-15 Last updated: 2012-11-15

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 43 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf