Construction and validation of calendar-year time scale for annually laminated sediments – an example from Lake Szurpiły (NE Poland)

GFF ◽  
2013 ◽  
Vol 135 (3-4) ◽  
pp. 248-257 ◽  
Author(s):  
Małgorzata Kinder ◽  
Wojciech Tylmann ◽  
Dirk Enters ◽  
Natalia Piotrowska ◽  
Grzegorz Poręba ◽  
...  
Keyword(s):  
Time Scale ◽  
Laminated Sediments ◽  
Ne Poland ◽  
Annually Laminated Sediments

scholarly journals A 40,000-Year Varve Chronology from Lake Suigetsu, Japan: Extension of the 14C Calibration Curve

Radiocarbon ◽  
1997 ◽  
Vol 40 (1) ◽  
pp. 505-515 ◽  
Author(s):  
Hiroyuki Kitagawa ◽  
Johannes Van Der Plicht
Keyword(s):  
Tree Ring ◽  
Calibration Curve ◽  
Time Scale ◽  
Mass Spectrometric ◽  
Laminated Sediments ◽  
Varve Chronology ◽  
Total Range ◽  
Dating Method ◽  
Annually Laminated Sediments ◽  
Potential Tool

A sequence of annually laminated sediments is a potential tool for calibrating the radiocarbon time scale beyond the range of the absolute tree-ring calibration (11 ka). We performed accelerator mass spectrometric (AMS) 14C measurements on >250 terrestrial macrofossil samples from a 40,000-yr varve sequence from Lake Suigetsu, Japan. The results yield the first calibration curve for the total range of the 14C dating method.

scholarly journals Radiocarbon and Varve Chronologies of Annually Laminated Lake Sediments of Gościαz Lake, Central Poland

Radiocarbon ◽  
1989 ◽  
Vol 31 (03) ◽  
pp. 940-947 ◽  
Author(s):  
Tomasz Goslar ◽  
Anna Pazdur ◽  
Mieczysław F Pazdur ◽  
Adam Walanus
Keyword(s):  
Water Depth ◽  
Time Scale ◽  
Laminated Sediments ◽  
Varve Thickness ◽  
Varve Chronology ◽  
Continuous Sequence ◽  
The World ◽  
Annually Laminated Sediments ◽  
Annually Laminated Lake Sediments ◽  
Good Agreement

A sequence of annually laminated sediments of the Gościαz Lake spans ca 13,000 yr and is actually the longest known continuous sequence in the world. 14C age measurements were performed on organic and carbonate fractions of bulk samples of laminated sediments from core GO. Accurate measurements of varve thickness performed on the lower part of cores G1 and G2 were used to establish a floating varve chronology covering ca 10,000 yr. Matching of cores GO, G1 and G2 permits comparison of 14C dates with varve chronology. Good agreement of calibrated 14C dates with the varve time scale suggests annual lamination of the sediment. Analysis of periodicities in varve thickness indicates solar 11-and 22-yr cycles, as well as a 200-yr cycle over a good part of the investigated sequence. Results of 14C measurements of carbonate fractions are used to study changes in the water depth of the lake during its history.

Paleolimnological studies of annually-laminated sediments in Loe Pool, Cornwall, U.K.

1983 ◽  
pp. 185-191 ◽  
Author(s):  
M. A. Coard ◽  
S. M. Cousen ◽  
A. H. Cuttler ◽  
H. J. Dean ◽  
J. A. Dearing ◽  
...  
Keyword(s):  
Laminated Sediments ◽  
Annually Laminated Sediments

A new high-resolution radiocarbon Bayesian age model of the Holocene and Late Pleistocene from core MD02-2494 and others, Effingham Inlet, British Columbia, Canada; with an application to the paleoseismic event chronology of the Cascadia Subduction Zone

2013 ◽  
Vol 50 (7) ◽  
pp. 746-760 ◽  
Author(s):  
Randolph J. Enkin ◽  
Audrey Dallimore ◽  
Judith Baker ◽  
John R. Southon ◽  
Tara Ivanochko
Keyword(s):  
British Columbia ◽  
High Resolution ◽  
Subduction Zone ◽  
Laminated Sediments ◽  
Cascadia Subduction Zone ◽  
K Value ◽  
Radiocarbon Dates ◽  
Age Model ◽  
Annually Laminated Sediments ◽  
Effingham Inlet

Annually laminated sediments from the anoxic inner basin of Effingham Inlet, Pacific coast of Vancouver Island, British Columbia, Canada, yield a high-resolution 42 m paleoenvironmental record, from the present to about 14 ka 14C BP (17 ka cal BP). A new age model, based on 68 radiocarbon dates from twigs and small plant material, from the 40 m core MD02-2494 and 2 m freeze cores from the surface, is anchored by the Mazama Ash and varve counting. A Poisson-process sedimentation model is used, applying a new method to determine the Poisson k value, giving a realistic age model compatible with the multi-proxy core data. Twenty-one “seismites”, which are lithofacies in the Effingham cores that may be representative of seismically triggered mass-wasting events, are identified and dated precisely, then compared with the chronology of the deep-sea turbidite record farther south in the Cascadia Subduction Zone (CSZ), to determine if regional sediment disturbances can be identified. With 16 proposed correlations, Effingham seismite ages are 169 ± 206 years older than turbidite ages estimated largely by radiocarbon analysis of foraminifera in hemipelagic deposits.

scholarly journals Solar activity expressed in a modern varve thickness sequence

2019 ◽  
Vol 56 (1) ◽  
pp. 32-46 ◽  
Author(s):  
Gary B. Hughes ◽  
Jordan Adams ◽  
Jaclyn M.H. Cockburn
Keyword(s):  
Solar Activity ◽  
Laminated Sediments ◽  
Varve Thickness ◽  
Ice Cap ◽  
Uv Emission ◽  
Depositional Settings ◽  
Climate Simulations ◽  
Direct Forcing ◽  
Climate Signals ◽  
Annually Laminated Sediments

Annually laminated sediments (varves) form in particular depositional settings, e.g., where seasonal climate produces fluctuations in runoff volume; variations in runoff affect the amount and type of sediment delivered to a catchment. Prior studies confirm that variations in selected varve traits correlate with inter-annual climate signals. In some locations, solar activity also appears to be expressed in varve characteristics, either through a direct effect or indirectly via influence of solar activity on climate. Evidence from proglacial Iceberg Lake, Alaska, indicates that solar activity may have directly contributed to varve deposition. A varve thickness sequence is compared to sunspot observations from 1610–1995 CE. Maunder and Dalton minima are clearly expressed in a varve power spectrogram; varve signal amplification beginning ca. 1950s CE coincides with increasing activity evident in a sunspot spectrogram, features that are only vaguely discernible in the raw time-series plots. Spectral relationships at sunspot periodicities are consistent with direct solar forcing of varve thickness, independent of any effect solar activity might otherwise have on climate. Simulations based on a meltwater model indicate that direct forcing could result from amplified ultraviolet (UV) emission during solar maxima, combined with lower UV albedo of glacial ice. The plausible forcing mechanism bolsters epistemology for concluding a cause–effect relationship: solar variability likely contributed directly to inter-decadal patterns in Iceberg Lake varve thicknesses. The putative effect could be enhanced at higher latitudes, where Earth’s atmosphere absorbs less of the UV energy emitted by the Sun; periods of lowered ozone concentration near the poles would exacerbate the natural abetting UV phenomena, potentially linking human activity to recent and accelerated polar ice cap melting.

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