A Younger Dryas Ash Bed in Western Norway, and Its Possible Correlations with Tephra in Cores from the Norwegian Sea and the North Atlantic

1984 ◽  
Vol 21 (1) ◽  
pp. 85-104 ◽  
Author(s):  
Jan Mangerud ◽  
Sven Erik Lie ◽  
Harald Furnes ◽  
Inger Lise Kristiansen ◽  
Leif Lømo
Keyword(s):  
Continental Shelf ◽  
Marine Sediments ◽  
North Atlantic ◽  
Volcanic Ash ◽  
Younger Dryas ◽  
Norwegian Sea ◽  
The North ◽  
Western Norway ◽  
Stratigraphic Position ◽  
The North Atlantic

A bed of volcanic ash up to 23 cm thick is found in lacustrine and marine sediments in western Norway. It is formally mamed the Vedde Ash Bed, and its age is approximately 10,600 yr B.P., i.e., mid-Younger Dryas. The bed consits of pure glass having a bimodal basaltic and rhyolitic composition. The geochemistry of the glass shards suggests an Icelandic source. By means of stratigraphic position and geochemistry, the ash is correlated with ash zones found in cores from the continental shelf, the Norwegian Sea, and the North Atlatic.

scholarly journals Polymastiidae (Porifera: Demospongiae) of the Nordic and Siberian Seas

2017 ◽  
Vol 98 (6) ◽  
pp. 1273-1335 ◽  
Author(s):  
Alexander Plotkin ◽  
Elena Gerasimova ◽  
Hans Tore Rapp
Keyword(s):  
North Atlantic ◽  
Related Species ◽  
Molecular Data ◽  
Wide Distribution ◽  
Morphological Data ◽  
Nordic Seas ◽  
Norwegian Sea ◽  
The North ◽  
Western Norway ◽  
The North Atlantic

Polymastiidae (Porifera: Demospongiae) of the Nordic and Siberian Seas are revised and compared with the related species of the North Atlantic based on the morphological data from the type and comparative material and the molecular data from fresh samples. Twenty species from six polymastiid genera are recorded. Two species,Polymastia svensenifrom Western Norway andSpinularia njordifrom the Norwegian Sea, are new to science. One species,Polymastia andrica, is new to the Nordic Seas and two species,Polymastiacf.bartlettiandP. penicillus, are new to the Scandinavian Coast. Distribution of the polymastiids in the North Atlantic and Arctic is discussed and the allegedly wide distribution ofSpinularia sarsiiandS. spinulariais questioned.

The North Atlantic atmosphere-sea surface 14C gradient during the Younger Dryas climatic event

1994 ◽  
Vol 126 (4) ◽  
pp. 275-287 ◽  
Author(s):  
Edouard Bard ◽  
Maurice Arnold ◽  
Jan Mangerud ◽  
Martine Paterne ◽  
Laurent Labeyrie ◽  
...  
Keyword(s):  
North Atlantic ◽  
Younger Dryas ◽  
Sea Surface ◽  
The North ◽  
Climatic Event ◽  
The North Atlantic

scholarly journals The carbon budget of the North Sea

2005 ◽  
Vol 2 (1) ◽  
pp. 87-96 ◽  
Author(s):  
H. Thomas ◽  
Y. Bozec ◽  
H. J. W. de Baar ◽  
K. Elkalay ◽  
M. Frankignoulle ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Continental Shelf ◽  
North Sea ◽  
North Atlantic ◽  
Carbon Budget ◽  
North Atlantic Ocean ◽  
Carbon Sink ◽  
The North ◽  
The North Sea ◽  
The North Atlantic

Abstract. A carbon budget has been established for the North Sea, a shelf sea on the NW European continental shelf. The carbon exchange fluxes with the North Atlantic Ocean dominate the gross carbon budget. The net carbon budget – more relevant to the issue of the contribution of the coastal ocean to the marine carbon cycle – is dominated by the carbon inputs from rivers, the Baltic Sea and the atmosphere. The North Sea acts as a sink for organic carbon and thus can be characterised as a heterotrophic system. The dominant carbon sink is the final export to the North Atlantic Ocean. More than 90% of the CO2 taken up from the atmosphere is exported to the North Atlantic Ocean making the North Sea a highly efficient continental shelf pump for carbon.

scholarly journals The Distal and Local Volcanic Ash in the Late Pleistocene Sediments of the Termination I Interval at the Reykjanes Ridge, North Atlantic, Based on the Study of the Core AMK-340

Geosciences ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 379
Author(s):  
Matul ◽  
Gablina ◽  
Khusid ◽  
Libina ◽  
Mikhailova
Keyword(s):  
North Atlantic ◽  
Volcanic Ash ◽  
Late Quaternary ◽  
Central Zone ◽  
Younger Dryas ◽  
Quaternary Sediments ◽  
Reykjanes Ridge ◽  
Volcanic Material ◽  
The North ◽  
Russian Research

We made the geochemical analysis of the volcanic material from the sediment core AMK-340 (the Russian research vessel “Akademik Mstislav Keldysh” station 340), the central zone of the Reykjanes Ridge. Two ash-bearing sediment units within the interval of the Termination I can be detected. They correlate with the Ash Zone I in the North Atlantic Late Quaternary sediments having an age of 12,170–12,840 years within the Younger Dryas cold chronozone and 13,600–14,540 years within the Bølling–Allerød warm chronozone. The ash of the Younger Dryas unit is presented mostly by the mafic and persilicic material originated from the Icelandic volcanoes. One sediment sample from this unit contained Vedde Ash material. The ash of the Bølling–Allerød unit is presented mostly by the mafic shards which are related to the basalts of the rift zone on the Reykjanes Ridge, having presumably local origin. Possible detection of Vedde Ash could help to specify the timing of the previously reconstructed paleoceanographic changes for the Termination I in the point of the study: significant warming in the area might have occurred as early as 300 years before the end of the conventional Younger Dryas cold chronozone.

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