Late Quaternary stratigraphy and paleo‐oceanography of the Grand Banks continental margin, eastern Canada
Quaternary sediments cored on the continental slope off the Grand Banks and on nearby seamounts and abyssal hills have been correlated back to at least isotopic stage 6. using lithologic and hioslratigraphic markers and warm‐cold cyclicity in microfossil assemblages. The sequence is dated using limi...
| Published in: | Boreas |
|---|---|
| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1983
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.1502-3885.1983.tb00319.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1983.tb00319.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1983.tb00319.x |
| Summary: | Quaternary sediments cored on the continental slope off the Grand Banks and on nearby seamounts and abyssal hills have been correlated back to at least isotopic stage 6. using lithologic and hioslratigraphic markers and warm‐cold cyclicity in microfossil assemblages. The sequence is dated using limited oxygen isotope and l4 C data. The oldest continental slope cores penetrate to a glacial stade with an extrapolated age of 50. 0(H) B. P. The oldest scamount cores probably penetrate to isotopic stage 13. Watcrmass distribution over the area results from interaction of the Labrador Current with locally generated shelf water, and to a lesser extent, the Gulf Stream. Planktic foraminiferal assemblages and sedimentological evidence suggest that arctic Labrador Current core water extends onto the eastern Grand Banks only during full interglacials. During intcrstadials, this arctic core water is absent, probably because its source‐was blocked by ice. Cold water during stadials probably results mostly from local cooling on the continental shelf. |
|---|