Late-Quaternary Sediment Cores from Lakes on Bjornoya: Appendix: Radiocarbon Analyses of Lake Sediment Samples from Bjørnøya

1968 ◽  
Vol 50 (4) ◽  
pp. 246 ◽  
Author(s):  
Ingrid U. Olsson
Keyword(s):  
Lake Sediment ◽  
Late Quaternary ◽  
Sediment Cores ◽  
Quaternary Sediment ◽  
Sediment Samples

Radiocarbon Dating of Pollen by Accelerator Mass Spectrometry

1989 ◽  
Vol 32 (2) ◽  
pp. 205-212 ◽  
Author(s):  
Thomas A. Brown ◽  
D. Erle Nelson ◽  
Rolf W. Mathewes ◽  
John S. Vogel ◽  
John R. Southon
Keyword(s):  
Mass Spectrometry ◽  
Lake Sediment ◽  
Standard Method ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Late Quaternary ◽  
Sediment Cores ◽  
Bulk Sediment ◽  
Sediment Dating ◽  
First Time

AbstractRadiocarbon dating of bulk sediments has been the standard method for establishing chronologies in the studies of lake sediment cores which have contributed significantly to our knowledge of late Quaternary paleo-environments. These bulk sediment dates are presumed to be direct ageindicators for the speciments (e.g., pollen or macrofossils) which are actually being studied. However, several recent studies have reinforced long-standing apprehensions concerning this presumption. In this study, we demonstrate for the first time the radiocarbon dating of pollen concentrate samples by accelerator mass spectrometry. The dates obtained by this method should provide more reliable radiocarbon chronologies for paleo-environmental studies than have been obtainable by bulk sediment dating.

Late-Quaternary Sediment Cores from Lakes on Bjørnøya

1968 ◽  
Vol 50 (4) ◽  
pp. 235 ◽  
Author(s):  
Hannu Hyvärinen ◽  
Hannu Hyvarinen
Keyword(s):  
Late Quaternary ◽  
Sediment Cores ◽  
Quaternary Sediment

scholarly journals Time-integrated 3D approach of late Quaternary sediment-depocenter migration in the Tagus depositional system: From river valley to abyssal plain

2016 ◽  
Vol 153 ◽  
pp. 192-211 ◽  
Author(s):  
Geert-Jan Vis ◽  
Cornelis Kasse ◽  
Dick Kroon ◽  
Jef Vandenberghe ◽  
Simon Jung ◽  
...  
Keyword(s):  
Late Quaternary ◽  
River Valley ◽  
Abyssal Plain ◽  
Quaternary Sediment ◽  
Depositional System

Cleaning of lake sediment samples for diatom oxygen isotope analysis

2004 ◽  
Vol 31 (3) ◽  
pp. 391-401 ◽  
Author(s):  
David W. Morley ◽  
Melanie J. Leng ◽  
Anson W. Mackay ◽  
Hilary J. Sloane ◽  
Patrick Rioual ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Lake Sediment ◽  
Isotope Analysis ◽  
Sediment Samples

scholarly journals Late Quaternary paleoenvironment of the Ross Sea continental shelf, Antarctica

1998 ◽  
Vol 27 ◽  
pp. 275-280 ◽  
Author(s):  
Akira Nishimura ◽  
Toru Nakasone ◽  
Chikara Hiramatsu ◽  
Manabu Tanahashi
Keyword(s):  
Organic Carbon ◽  
Marine Environment ◽  
Environmental Changes ◽  
Ross Sea ◽  
Late Quaternary ◽  
Sedimentary Environment ◽  
Sediment Cores ◽  
Ice Sheet ◽  
Ice Shelf ◽  
Accelerator Mass Spectrometer

Based on sedimenlological and micropaleontological work on three sediment cores collected at about 167° Ε in the western Ross Sea, Antarctica, and accelerator mass spectrometer l4C ages of organic carbon, we have reconstructed environmental changes in the area during the late Quaternary. Since 38 ka BP at latest, this area was a marine environment with low productivity. A grounded ice sheet advanced and loaded the sediments before about 30-25 ka BP. After 25 ka BP, the southernmost site (76°46'S) was covered by floating ice (shelf ice), preventing deposition of coarse terrigenous materials and maintaining a supply of diatom tests and organic carbon until 20 ka BP. The northernmost site (74°33'S) was in a marine environment with a moderate productivity influenced by shelf ice/ice sheet after about 20 ka BP. Since about 10 ka BP, a sedimentary environment similar to the present-day one has prevailed over this area.

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