scholarly journals Effects of sample mass and macrofossil type on radiocarbon dating of arctic and boreal lake sediments

The Holocene ◽  
2005 ◽  
Vol 15 (5) ◽  
pp. 758-767 ◽  
Author(s):  
W. Wyatt Oswald ◽  
Patricia M. Anderson ◽  
Thomas A. Brown ◽  
Linda B. Brubaker ◽  
Feng Sheng Hu ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Radiocarbon Dating ◽  
Sample Mass ◽  
Boreal Lake

scholarly journals A Simple Method to Separate Pollen for AMS Radiocarbon Dating and its Application to Lacustrine and Marine Sediments

Radiocarbon ◽  
1999 ◽  
Vol 41 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Scott A Mensing ◽  
John R Southon
Keyword(s):  
Mass Spectrometry ◽  
Lake Sediments ◽  
Marine Sediments ◽  
Radiocarbon Dating ◽  
Minimal Cost ◽  
Simple Method ◽  
Ams Radiocarbon Dating ◽  
Sediment Reworking ◽  
Scientific Equipment ◽  
Ams Dating

We present a simple method for manually separating pollen concentrates for radiocarbon accelerator mass spectrometry (AMS) dating using a mouth pipetting system. The required equipment is readily available from scientific equipment supply houses at minimal cost. Pollen samples from lake sediments required about 4 h of hand picking, whereas samples from marine sediments required about 8 h labor. Pollen dates from marine sediments were much older than expected. We are attempting to resolve whether this is due to contamination of the pollen or the presence of significant quantities of old reworked pollen. Pollen dates from lake sediments associated with Mazama Ash were consistent with other published ages; however, replicate dates on pollen samples from above the ash were consistently older than the surrounding sediment. Our results suggest that caution must be used when interpreting pollen dates if the potential for sediment reworking is present.

Interstadial Conifer Wood from Northern Maine

1988 ◽  
Vol 30 (1) ◽  
pp. 98-101
Author(s):  
R. Scott Anderson ◽  
Ronald B. Davis ◽  
Robert Stuckenrath ◽  
Harold W. Borns
Keyword(s):  
Organic Matter ◽  
New England ◽  
Lake Sediments ◽  
Lake Sediment ◽  
Radiocarbon Dating ◽  
Late Glacial ◽  
Local Source ◽  
Northern New England ◽  
Upper South ◽  
Conifer Wood

Conifer wood, probably spruce (Picea sp.), of middle Wisconsinan age (29,200 ± 500 yr B.P.) was recovered from late-glacial lake sediments from Upper South Branch Pond, Maine. If the wood was derived from a local source, deglaciation of part of northern New England is suggested for this time. The occurrence also has implications for understanding the problem associated with radiocarbon dating of bulk lake sediment containing small amounts of organic matter.

scholarly journals Disturbances in the primary stratigraphy of lake sediments on the Murmansk coast (Russia): their identification and relationship with catastrophic events

Baltica ◽  
2019 ◽  
Vol 32 (2) ◽  
pp. 156-169
Author(s):  
Svetlana Nikolaeva ◽  
Dmitriy Tolstobrov ◽  
Alena Tolstobrova
Keyword(s):  
Lake Sediments ◽  
Radiocarbon Dating ◽  
Barents Sea ◽  
Plant Macrofossils ◽  
Analysis Data ◽  
Diatom Analysis ◽  
Catastrophic Events ◽  
Coastal Lake ◽  
Diatom Flora ◽  
The Barents Sea

The results of lithological, diatom analysis and radiocarbon dating of bottom sediments of small coastal lake basins along the Murmansk coast of the Barents Sea (the Kola Region, Russia) are presented. Sedimentary successions of two lakes reveal the presence of distinctive deposits, very different from the sediment above and below. These deposits are represented by erosional unconformity beds, gyttja and sand mixed with plant macrofossils, and characterized by changes in diatom flora and sand in a matrix of organic material. The sediments were deposited due to different catastrophic events: paleo-tsunami and paleo-earthquakes. According to radiocarbon analysis data, a tsunami occurred between 10,400–8200 cal yr BP and a paleo-earthquake occurred between 8200–7200 cal yr BP. We discuss various causes and mechanisms for the formation of disturbances in lake sediments, including the Storrega tsunami and paleo-earthquakes, which during and after deglaciation were strong and frequent.

scholarly journals Phosphorus burial in vivianite in three boreal lake sediments in Finland

2021 ◽  
Author(s):  
Johanna Laakso ◽  
Tom Jilbert ◽  
Timo Saarinen
Keyword(s):  
Lake Sediments ◽  
Boreal Lake

RADIOCARBON DATING POLLEN GRAINS SORTED BY FLOW CYTOMETRY FROM LAKE SEDIMENTS OF MONO LAKE (CALIFORNIA)

2017 ◽  
Author(s):  
Irene Tunno ◽  
◽  
Susan H. Zimmerman ◽  
Tom Brown ◽  
Christiane A. Hassel
Keyword(s):  
Flow Cytometry ◽  
Lake Sediments ◽  
Radiocarbon Dating ◽  
Pollen Grains ◽  
Mono Lake

scholarly journals Radiocarbon Dating of Lake Sediment from Two Karst Lakes in Yugoslavia

Radiocarbon ◽  
1986 ◽  
Vol 28 (2A) ◽  
pp. 495-502 ◽  
Author(s):  
Dušan Srdoč ◽  
Bogomil Obelić ◽  
Nada Horvatinčić ◽  
Ines Krajcar-Bronić ◽  
Elena Marčenko ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Lake Sediment ◽  
Sedimentation Rate ◽  
National Park ◽  
Radiocarbon Dating ◽  
Sediment Cores ◽  
Karst Area ◽  
Seismic Profiles ◽  
Karst Lakes ◽  
Isotopic Studies

Samples of sediment cores from two lakes in the karst area of northwest Yugoslavia were analyzed. Both Lakes Kozjak and Prošće are in the Plitvice National Park, Central Croatia. 14C dating, sedimentologic, seismic, and isotopic studies, and distribution of diatoms are presented.14C dating of lake marl revealed a uniforn sedimentation rate in Lake Prošće as opposed to Lake Kozjak. Both lake sediments belong to the Holocene period. 14C dating of lake sediment is in agreement with seismic profiles, sedimentologic analysis, and diatom frequency measurements both in an undisturbed as well as in a disturbed lake sediment.

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