Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

de Vernal, Anne; Mudie, Peta J (1989): Pliocene and Pleistocene palynomorphs in ODP Leg 105 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.744822, Supplement to: de Vernal, A; Mudie, PJ (1989): Pliocene and Pleistocene palynostratigraphy at ODP Sites 646 and 647, eastern and southern Labrador Sea. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 401-422, https://doi.org/10.2973/odp.proc.sr.105.134.1989

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Pliocene and Pleistocene sediments from ODP Hole 647A in the south central Labrador Sea and Hole 646B off southwest Greenland were sampled at 1.5-m intervals for studies of terrestrial and marine palynomorphs, including pollen, spores, dinocysts, and acritarchs. The dinocyst assemblages suggest that surface-water masses were cool-temperate to subarctic during most of the Pliocene and Pleistocene. The occurrence of a few warm-temperate indicators, notably Impagidinium species and Polyspaeridium zoharyi, suggests almost continuous northward advection of warm North Atlantic Drift into the Labrador Sea. A major decrease in dinocyst diversity and abundance marks the late Pliocene to early Pleistocene interval. The abundance of acritarchs in Pliocene sediments off southwest Greenland suggests high productivity, which may reflect nutrient flux from the shelf or upwelling; productivity appears to have been much lower at the central Labrador Sea site. Pollen and spore concentrations also decrease from the late Pliocene to early Pleistocene. This diminution probably reflects the impoverishment of vegetation and southward migration of the eastern Canadian tree line at the onset of climatic cooling and glaciation.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 55.770300 * Median Longitude: -46.815550 * South-bound Latitude: 53.331300 * West-bound Longitude: -48.369100 * North-bound Latitude: 58.209300 * East-bound Longitude: -45.262000
Date/Time Start: 1985-10-04T08:45:00 * Date/Time End: 1985-10-23T18:15:00
Event(s):
105-646B * Latitude: 58.209300 * Longitude: -48.369100 * Date/Time Start: 1985-10-04T08:45:00 * Date/Time End: 1985-10-13T21:01:00 * Elevation: -3459.0 m * Penetration: 766.7 m * Recovery: 404.25 m * Location: Labrador Sea * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 80 cores; 766.2 m cored; 0 m drilled; 52.8 % recovery
105-647A * Latitude: 53.331300 * Longitude: -45.262000 * Date/Time Start: 1985-10-15T04:10:00 * Date/Time End: 1985-10-23T18:15:00 * Elevation: -3869.0 m * Penetration: 736 m * Recovery: 444.6 m * Location: South Atlantic Ocean * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 75 cores; 716.6 m cored; 0 m drilled; 62 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. de Vernal, A; Mudie, PJ (1989): (Table 1) Palynomorph concentrations in ODP Hole 105-646B samples. https://doi.org/10.1594/PANGAEA.744820
  2. de Vernal, A; Mudie, PJ (1989): (Table 2) Palynomorph concentrations in ODP Hole 105-647A samples. https://doi.org/10.1594/PANGAEA.744821