Cyclic Lamination in Proximal Varves Reflecting the Length of Summers during Late Weichsel in Southernmost Sweden

Ringberg, Bertil

doi:10.1007/978-94-015-7692-5_5

Cited by 13 publications

(12 citation statements)

References 6 publications

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“…Difficulties related to the distinction between varves and rhythmites reported from various depositional environments (e.g. Lambert & Hsti, 1979;Ringberg, 1984;Ostrem & Olsen, 1987;Lemmen et al, 1988;Stihler et al, 1992) can thus be avoided. Varved sediments from Lake C2 are used to establish the first varve chronology for the High Arctic.…”

Section: Discussionmentioning

confidence: 99%

Recent sedimentation in a high arctic lake, northern Ellesmere Island, Canada

Zolitschka

1996

J Paleolimnol

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A multiple core study was conducted on laminated minerogenic sediments from Lake C2, northern Ellesmere Island, Canadian High Arctic. Lateral persistence, distal thinning, variation in grain size of these laminations as well as present-day processes of highly seasonal sediment transfer into the lake basin suggest that clastic varves have been formed. Sedimentation rates based on 21~ dating agree well with sedimentation rates based on lamination counts giving further evidence that laminations are annual. Errors in varve counting were reduced from 12% to <2% using the multi-core approach of cross-correlating all records. Varved sediments are occasionally interrupted by thick coarse-grained layers, which are interpreted as deposits of turbidity currents and may be related to extremely high discharge events and slope failures of the delta front. Micro-laminated sediments spanning the last two centuries were studied in detail. Suspension settling is the dominant process of deposition depending upon stream discharge which is controlled by nival melt and summer temperatures. Application of varve chronology thus allows to use lamination thickness measurements as source of high resolution proxy data for palaeoclimatic reconstruction.

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Section: Discussionmentioning

confidence: 99%

Recent sedimentation in a high arctic lake, northern Ellesmere Island, Canada

Zolitschka

1996

J Paleolimnol

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“…The results of this investigation give no reasons to differ from the opinion that the observed rhythmic lamination in the summer layers of the proximal varves in the lower plains of the Bredåkra delta corresponds to the day and night rhythm in the transportation of material in the melt-water streams and its sedimentation in the Baltic Ice Lake c. 10 m below the highest shoreline during the deglaciation in the Late Weichselian (Ringberg 1971(Ringberg , 1984(Ringberg , 1991. The stratigraphy at the described site date the lower delta plains to the Bölling Chronozone on basis of the so called "diffuse varves" in the uppermost part of the stratigraphy.…”

Section: Discussionmentioning

confidence: 56%

“…These authors discussed whether rhythmites in glaciolacustrine deltas and varved clays were deposited as a result of the diurnal rhythm in the transportation of material and its sedimentation in the meltwater from the ice or varying runoff due to storms and other short-term weather changes causing temporal pulses in the inflow. Rhythmites in the proximal varves in the bottomset beds of glaciolacustrine deltas in southeastern Sweden were studied by Ringberg (1971Ringberg ( , 1984Ringberg ( , 1991 who suggested that the layers were daily deposits with the coarse silt and fine sand in the couplets deposited during daytime and those of silt deposited at night. The purpose of the present investigation is to evaluate a new technique of greyscale and colour profiling in studying rhythmites in proximal varves.…”

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confidence: 99%

Image analysis of rhythmites in proximal varves in Blekinge, southeastern Sweden

Lindeberg¹,

Ringberg²

1999

GFF

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“…These include: (1) diurnal variation in inflow (e.g. Ringberg, 1984); (2) subseasonal variations due to short-term (hours to days) changes in inflow (e.g. Lambert and Hsü, 1979;Hambley and Lamoureux, 2006); (3) seasonal variations resulting in two separate peaks in sediment input due to late spring snowmelt and summer ice melt (e.g.…”

Section: Varve Formationmentioning

confidence: 99%

Seasonal Controls on Deposition of Late Devensian Glaciolacustrine Sediments, Central Ireland

Delaney

2007

Glacial Sedimentary Processes and Products

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Laminated proglacial glaciolacustrine sediments dating from the Late Devensian (22-10 Ka BP) from central Ireland were examined using a combination of detailed logging and Scanning Electron Microscope (SEM) microfabric analyses. The sediments are rhythmically laminated and consist of coarser, pale silt layers which alternate with darker clay layers containing occasional thin laminae of fine sand and coarse silt. The pale silt layers contain single or multiple normally graded laminae, erosional surfaces and soft sediment deformation structures, indicating deposition from multiple high density underflows. The dark clay layers have sharp upper and lower contacts and an internal fabric consistent with deposition from a combination of flocculation and grain-by-grain deposition. Silt laminae within the clay layers are interpreted as sporadic turbidity underflows. The sediments are interpreted as annually laminated (varved). Varves deposited close to the ice margin showed considerable spatial variation in thickness and adjacent sequences could not be correlated; however sequences of medial varves separated by 500 m were correlatable by thickness. As glaciolacustrine deposits are widespread throughout the Irish midlands, it is likely that a varve chronology could be constructed.

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Cyclic Lamination in Proximal Varves Reflecting the Length of Summers during Late Weichsel in Southernmost Sweden

Cited by 13 publications

References 6 publications

Recent sedimentation in a high arctic lake, northern Ellesmere Island, Canada

Recent sedimentation in a high arctic lake, northern Ellesmere Island, Canada

Image analysis of rhythmites in proximal varves in Blekinge, southeastern Sweden

Seasonal Controls on Deposition of Late Devensian Glaciolacustrine Sediments, Central Ireland

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