Plio-Pleistocene sedimentation regimes leading to chalk-marl-cycles in the North Atlantic (DSDP Site 552 — Hole 552A)

1989 ◽  
Vol 78 (3) ◽  
pp. 959-985 ◽  
Author(s):  
Liselotte Diester-Haass ◽  
Detmar Schnitker
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic ◽  
Dsdp Site

Plio-Pleistocene radiolarian biostratigraphy and palaeoceanography of the mid-latitude North Atlantic (DSDP Site 609)

1994 ◽  
Vol 131 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Simon K. Haslett
Keyword(s):  
North Atlantic ◽  
Deep Sea ◽  
Sea Surface ◽  
Abundance Distribution ◽  
The North ◽  
Radiolarian Biostratigraphy ◽  
The North Atlantic ◽  
First Time ◽  
Drilling Project ◽  
Dsdp Site

AbstractRadiolaria were examined throughout the Plio-Pleistocene of Deep Sea Drilling Project (DSDP) Site 609. Eight radiolarian datum-levels (first and last appearances) were identified, some for the first time in the North Atlantic. The recognition of these datums allows correlation between the Atlantic, Pacific and Indian oceans, through a previously published zonal scheme (Johnson et al. 1989). Zones NR1 to NR11 were recognized, although some zones had to be combined (NR1–2 and NR8–10) due to the absence of some stratigraphically important taxa. The relative abundance distribution of the radiolarian palaeoceanographical proxy Didymocyrtis tetrathalamus indicated three cool phases (0/0.56–0.75 Ma, 1.2–1.33/1.69–1.86 Ma, and 2.14–2.32/3.73– > 4.1 Ma) interrupted by two relatively warm episodes (0.56–0.75/1.2–1.33 Ma and 1.69–1.86/2.14–2.35 Ma). These fluctuations in sea-surface temperature (SST) correspond with palaeoclimatic events indicated by other proxies (e.g. Foraminifera), such as the onset of Northern Hemisphere glaciation. This study illustrates the usefulness of radiolaria in North Atlantic stratigraphical and palaeoceanographical analysis.

The Currents of the North Atlantic

1892 ◽  
Vol 34 (872supp) ◽  
pp. 13940-13941
Author(s):  
Richard Beynon
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic
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