AMS<sup>14</sup>C chronologies of Holocene lake sediments in the Abisko area, northern Sweden – a comparison between dated bulk sediment and macrofossil samples

Barnekow, Lena; Possnert, Göran; Sandgren, Per

doi:10.1080/11035899801201059

Cited by 97 publications

(74 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent comparisons between dated bulk sediment and macrofossil samples from various lakes often show marked discrepancies, and radiocarbon chronologies from lake sediments are often based on AMS-radiocarbon dated terrestrial plant macrofossils (e.g. Barnekow et al, 1998). However, on certain sites and under certain conditions, AMS dates on terrestrial plant macrofossils are not superior to bulk sediment samples (e.g.…”

Section: Methods Reflecting Glacier Activitymentioning

confidence: 99%

Reconstruction of former glacier equilibrium-line altitudes based on proglacial sites: an evaluation of approaches and selection of sites

Dahl

Bakke

Lie

et al. 2003

Quaternary Science Reviews

115

View full text Add to dashboard Cite

Various approaches are used to record variations in glacier activity and equilibrium-line altitudes (ELAs) based on proglacial sites (lacustrine and terrestrial). These approaches are based on a conceptual model of glacier-meltwater induced sedimentation in which the minerogenic (nonorganic) component of the sediments is related to the occurrence of a glacier in the catchment. The principal coupling to former glacier activity and ELAs is common for these approaches. However, different methods and techniques may complement each other, and both possibilities and limitations are demonstrated. Site selection for reconstructing variations in glacier activity/ELAs is evaluated and critical factors are discussed. Rerouting of glacier meltwater streams across local watersheds in combination with proglacial sites gives a distinct on/off signal for former glacier activity/ELAs. Together with representative lateral moraines of known age, local watersheds are important for calibrating reconstructed glacier activity/ELAs based on a chain of proglacial lakes. Based on the 'modern analogue principle', various proxies can record whenever glaciers existed in a catchment. In a chain of proglacial lakes with different sensitivity to record variations in glacier activity/ELAs, these proxies can be calibrated against independent records. For one-site approaches, however, variations in glacier activity/ELAs depend on the interpretation and sensitivity of the proxies used.

show abstract

Section: Methods Reflecting Glacier Activitymentioning

confidence: 99%

Reconstruction of former glacier equilibrium-line altitudes based on proglacial sites: an evaluation of approaches and selection of sites

Dahl

Bakke

Lie

et al. 2003

Quaternary Science Reviews

115

View full text Add to dashboard Cite

show abstract

“…It has been shown that aquatic plants build into their cellular material the 14 C: 12 C ratio of the lake water (Turney et al, 2000), which may be higher than the atmospheric 14 C: 12 C ratio (MacDonald et al, 1987). This 'hard-water' effect is prominent in areas with carbonate bedrock, but bulk samples of lacustrine sediment may yield anomalously old dates even in soft-water lakes (Old eld et al, 1997;Barnekow et al, 1998).…”

Section: Gyttja Samplesmentioning

confidence: 99%

“…The four dates of macro ora from mass ow deposits may possibly be older than the actual debris-ow event. The dates of twigs from gyttja may also be problematic, because such plant fragments can rest on the ground or shallowly buried for decades to centuries before being eventually washed into a lake (Barnekow et al, 1998). With the exception of the anomalously young (470-290 cal.…”

Section: Terrestrial Macro Ora Samplesmentioning

confidence: 99%

Holocene debris flows recognized in a lacustrine sedimentary succession: sedimentology, chronostratigraphy and cause of triggering

Sletten¹,

Blikra

Ballantyne

et al. 2003

The Holocene

View full text Add to dashboard Cite

This study focuses on the sedimentary characteristics and the chronostratigraphy of Holocene mass ow deposits recognized in a lake-ll sedimentary succession. These deposits in lake Ulvådalsvatnet, western Norway, are discrete, sharp-bounded units of sand-sized sediment, running from gravelly and graded to silt-rich, and characterized by low total carbon and water contents. They are rich in terrestrial macro ora detritus, dark brown in colour, and interpreted as high-density turbidity current deposits attributed to subaerial debris ows that plunged into the lake. Thirty-three 14 C AMS dates were derived from three cores, and though the ages are somewhat inconsistent (macro ora invariably younger than bulk sediment samples), they indicate a marked increase in debris-ow processes after c. 2200 cal. yr BP, considered to re ect increased occurrence of heavy rainstorms.

show abstract

“…Radiocarbon dates were preferably obtained by AMS on terrestrial plant macrofossils in order to avoid problems with lake hardwater (Barnekow et al, 1998) and marine reservoir effects (Mangerud and Gulliksen, 1975). Some dates, however, were obtained from marine molluscs and bulk gyttja samples.…”

Section: Research Strategy and Methodsmentioning

confidence: 99%

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Lohne¹,

Bondevik²,

Mangerud³

et al. 2004

J Quaternary Science

View full text Add to dashboard Cite

Abstract:A detailed shoreline displacement curve documents the Younger Dryas transgression in western Norway. The relative sea-level rise was more than 9m in an area which subsequently experienced an emergence of almost 60 m. The sea-level curve is based on the stratigraphy of six isolation basins with bedrock thresholds. Effort has been made to establish an accurate chronology using a calendar year time-scale by 14C wiggle matching and the use of time synchronic markers (the Vedde Ash Bed and the postglacial rise in Betula (birch) pollen). The sea-level curve demonstrates that the Younger Dryas transgression started close to the Allerød-Younger Dryas transition and that the high stand was reached only 200 yr before the Younger Dryas-Holocene boundary. The sea level remained at the high stand for about 300 yr and 100 yr into Holocene it started to fall rapidly. The peak of the Younger Dryas transgression occurred simultaneously with the maximum extent of the ice-sheet readvance in the area. Our results support earlier geophysical modelling concluding a causal relationship between the Younger Dryas glacier advance and Younger Dryas transgression in western Norway. We argue that the sea-level curve indicates that the Younger Dryas glacial advance started in the late Allerød or close to the Allerød-Younger Dryas transition.

show abstract

AMS¹⁴C chronologies of Holocene lake sediments in the Abisko area, northern Sweden – a comparison between dated bulk sediment and macrofossil samples

Cited by 97 publications

References 20 publications

Reconstruction of former glacier equilibrium-line altitudes based on proglacial sites: an evaluation of approaches and selection of sites

Reconstruction of former glacier equilibrium-line altitudes based on proglacial sites: an evaluation of approaches and selection of sites

Holocene debris flows recognized in a lacustrine sedimentary succession: sedimentology, chronostratigraphy and cause of triggering

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Contact Info

Product

Resources

About

AMS14C chronologies of Holocene lake sediments in the Abisko area, northern Sweden – a comparison between dated bulk sediment and macrofossil samples

Cited by 97 publications

References 20 publications

Reconstruction of former glacier equilibrium-line altitudes based on proglacial sites: an evaluation of approaches and selection of sites

Reconstruction of former glacier equilibrium-line altitudes based on proglacial sites: an evaluation of approaches and selection of sites

Holocene debris flows recognized in a lacustrine sedimentary succession: sedimentology, chronostratigraphy and cause of triggering

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Contact Info

Product

Resources

About

AMS¹⁴C chronologies of Holocene lake sediments in the Abisko area, northern Sweden – a comparison between dated bulk sediment and macrofossil samples