Palynology of ODP Site 108-658
Fuente:
PANGAEA
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
1989
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867171360320520192 |
|---|---|
| author | Dupont, Lydie M Beug, Hans-Jürgen Stalling, H Tiedemann, Ralf |
| author_facet | Dupont, Lydie M Beug, Hans-Jürgen Stalling, H Tiedemann, Ralf |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Ocean Drilling Program Site 658 at 21°N off northwest Africa has a high sedimentation rate and a high concentration of pollen grains and is thus very suitable for detailed pollen analysis. The time scale for the upper 100 m (the last 670 k.y.) of Site 658 is based on biostratigraphic data and isotope stratigraphy. The pollen record has been divided into 34 zones. These are classified into 7 zone types covering a range from very arid to rather humid conditions. The sequence shows a long-term climatic decline: strong glacial stages were found only after 480 k.y. and strong interglacial stages only before 280 k.y. The Site 658 record correlates well with a terrestrial sequence from northern Greece, although both records differ in their response to global climatic change. Spectral analysis shows a 100- and a 42-k.y. period in the curves of pollen brought in by the northwest trade winds and only a 42-k.y. period in the curves of pollen mostly transported by the African Easterly Jet. A 31-k.y. period is found in the curves for Ephedra and Chenopodiaceae-Amaranthaceae. In addition, Ephedra shows a 54-k.y. period. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_746645 |
| institution | PANGAEA |
| language | en |
| publishDate | 1989 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Palynology of ODP Site 108-658 Dupont, Lydie M Beug, Hans-Jürgen Stalling, H Tiedemann, Ralf 108-658; 108-658A; 108-658B; Canarias Sea; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Leg108; Ocean Drilling Program; ODP Ocean Drilling Program Site 658 at 21°N off northwest Africa has a high sedimentation rate and a high concentration of pollen grains and is thus very suitable for detailed pollen analysis. The time scale for the upper 100 m (the last 670 k.y.) of Site 658 is based on biostratigraphic data and isotope stratigraphy. The pollen record has been divided into 34 zones. These are classified into 7 zone types covering a range from very arid to rather humid conditions. The sequence shows a long-term climatic decline: strong glacial stages were found only after 480 k.y. and strong interglacial stages only before 280 k.y. The Site 658 record correlates well with a terrestrial sequence from northern Greece, although both records differ in their response to global climatic change. Spectral analysis shows a 100- and a 42-k.y. period in the curves of pollen brought in by the northwest trade winds and only a 42-k.y. period in the curves of pollen mostly transported by the African Easterly Jet. A 31-k.y. period is found in the curves for Ephedra and Chenopodiaceae-Amaranthaceae. In addition, Ephedra shows a 54-k.y. period. |
| title | Palynology of ODP Site 108-658 |
| topic | 108-658; 108-658A; 108-658B; Canarias Sea; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Leg108; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.746645 |