Ridge et al., 2012 - Department of Earth and Ocean Sciences - Tufts
ness and ablation were more subtle, but can still be linked to ice sheet activity. Only ... Key words: Glacial varves, varve chronology, radiocarbon chronology, deglacia- .... varve records of glacial Lake Hitchcock in the Connecticut Valley of western New .... (1940) based on the matching of annual layers from varve sequences ...
[ Ridge_et_al_2012.pdf - Read/Download File
Analysis of Varved Sediment and Weather Relationships in Lake
Glacial varves can provide a climate proxy record based on their .... interrupted by intra-annual deposits produced by precipitation or melting events ... However, with the aim of creating a master varve chronology for Lake Linnè, ... occur within the summer layer due to variations in depositional factors driven by snowmelt,.
[ Jeremy Wei thesis.pdf?sequence=1 - Read/Download File
Climatic Change - UMass Geosciences
coldest episodes of the post-glacial, to ... fects has indeed begun to occur; 2) how ... of these issues can be adequately re- .... Heavy lines indicate contours of annual temperature trends in C per decade .... Melt layers in the Agassiz Ice .... kg ) into Lake C2, the adjusted Lake 02 varve chronology (Hardy et al ., 1996), and the.
[ hardy1997.pdf - Read/Download File
rhythmic sedimentation in glacial lake hitchcock, massachusetts
Proposed method of sediment distribution in glacial Lake. Hitchcock . ... Diagram showing change in layer thickness through a section of ... Hitchcock are rhythmites composed of silt and clay couplets that occur in three ... He worked out a varve chronology of 4,100 years from Rocky Hill,. Conn. ... Although the annual nature.
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Little Ice Age recorded in summer temperature reconstruction from
Clastic varved sediments from Donard Lake, in the Cape Dyer region of Baffin ... seasonal variation in sediment supply results in the annual deposition of ... age based on paired-layer counts. .... falls below the threshold, the Caribou Glacier does not ... to construct the varve chronology, 95DON-B03 and 95DON-05, lie in the ...
[ Moore2001.pdf - Read/Download File
Sedimentation in arctic proglacial lakes - University of Northern
Several sediment cores were collected from two proglacial lakes in the ... measurements of suspended sediment transport by proglacial streams can be used ... lead-210) on multiple sediment cores to establish core chronologies and ..... winter layers in Icefall Lake represent annual varve couplets and not pseudovarves (cf.
[ hp2000.pdf - Read/Download File
Varves - University of Nevada, Reno
students surveyed Swedish glacial lakes and found that ... Dark layers of marine varves are typically ... Once the sediment is collected, the varves can be ... that to infer sedimentation rate and varve chronology. .... which species occur during warm or cold periods. The .... the annual cycle of diatom production and export flux.
[ Weinheimer&Biondi2003.pdf - Read/Download File
A 3000-year varved record of glacier activity and climate change
Jul 6, 2011 ... from the proglacial lake Hvítárvatn, Iceland .... The few records with annual to decadal resolution for late .... winter thaws and/or late season ice cover may occur. Recent ..... final, multi-core varve chronology was constructed for the histor - ... tephra layer and produced a varve age of 982 BC for this eruption.
[ Larsen,_2011_Hvitarvatn.pdf - Read/Download File
Varves in lake sediments - a review
laminae in varved lake sediments typically express contrasting colours, always ... To reliably establish a varve chronology, the annual character of laminations needs to be determined .... layers of organic matter (tree rings) comparable to successive pages ..... Climatic conditions can produce sets of seasonally contrasting.
[ 1-s2.0-S0277379115001262-main.pdf - Read/Download File
CLIMATE INFLUENCE ON VARVE SEDIMENTATION AT CASCADE
The Cascade Lake varve sequence was then compared to the varve record ... annual basis between varve thickness and hydrological controls. .... 4.1 Chronology. 22 ..... Generally, in proglacial lakes, as the colder, sediment-rich melt water ...... This second peak likely produced the thin silt parting within the clay layer as the.
[ Roop_2009.pdf - Read/Download File
Leaf wax δ2H and varve-thickness climate proxies from proglacial
Leaf wax δ2H and varve-thickness climate proxies from proglacial lake ... century warming recorded throughout the Arctic. δ2Hwax does record regional-scale .... to produce leaf waxes that are deposited in measurable quantities in lake sediments. .... to silt lower layer that grades normally into an olive-gray fine- grained cap.
[ y3175423647008m2.pdf - Read/Download File
Meromictic lakes and varved lake sediments in North America
Varve laminae and turbidite layers in sediments from Green Lake, Fay- etteville, New York 3. 5. ... to provide a precise yearly chronology. ... nations usually occurs in lakes whose bottom waters are ... lake is ice covered, fine organic material and clay will settle to ...... sediment chemistry and post glacial production rates in a.
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Genesee Valley Glacial and Postglacial Geology - Rasny.org
The global chronology for The Pleistocene Epoch, or “ice age,” has been significantly ... lower proglacial lakes formed in the Genesee Valley (Fairchild, 1904, 1928), ..... not clear whether the layers preserved are actually produced by annual ... activity in lakes also can sometimes create multiple varve-like layers). Annual ...
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Event layers in the Japanese Lake Suigetsu 'SG06' sediment core
Jan 1, 2014 ... Here we present a 40 ka event layer chronology from Lake Suigetsu, Japan. ... For instance, the flood layer frequency is highest in the Glacial at around .... primarily intended for varve counting and lamination is generally poor above .... That a seasonal layer does not occur below every type I event layer is ...
[ 1-s2.0-S0277379113004204-main.pdf?_tid=cc07ea6e-57a9-11e4-b346-00000aab0f6b&acdnat=1413734931_0b8f7189329bba1f2bc0e2a95dc06811 - Read/Download File
Climate variability and glacial processes in eastern Iceland during
Properties of varved sediments from Lake L ¨ogurinn in eastern Iceland and ... by 137Cs analysis and eight historical tephras verify the varve chronology. .... Mean 1961–1989 annual precipitation was 766 mm aÀ1 .... The radiographic images produced by the ITRAX ... tephra layers commonly occur in soils and sediments.
[ Striberger et al Boreas 2011.pdf - Read/Download File
genesis and sedimentation of an ice-walled lake plain in - Ideals
Ice-walled lake plains (IWLPs) form along glacial margins in areas of stagnating ice. ... chronology of ice stagnation by obtaining radiocarbon ages of tundra plant fossils ... layers that are too thin and inconsistent for annual varves. ..... interspersed depressions, and can occur in groups with generally no preferred orientation.
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Proglacial Lakes - White Rose Research Online
This is an author produced version of Proglacial Lakes: character, behaviour and ... Proglacial lakes can exacerbate mountain glacier and ice sheet margin ... seasonal patterns, inter-annual patterns, and long-term patterns of glacier- derived meltwater .... Formation of moraine-dammed lakes is quasi-periodic and is usually ...
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Early recognition of the large River vallcy was covering ject of
Glacial Lake Hitchcock are rhythmites composed of silt ... varve chronology with a ... it seems likely that they are annual ... Glacial Lake. Hitchcock can be proposed from examination of grain size dis .... thicker clay layer. 025 to. 125 cm. Total varve thickness in the three localities ... area \vliere clay deposition usually occurs.
[ SEC15.body.pdf - Read/Download File
A varve record of increased 'Little Ice Age' rainfall associated with
Abstract: Varved sediments from Nicolay Lake, Canadian High Arctic, record major summer rainfall events ... Volcanic activity may produce atmospheric conditions more .... and Agassiz Ice Cap, Ellesmere Island, percentage annual melt layers (Fisher and .... variety of precipitation-bearing situations can occur in the Canad-.
[ holocene2001.pdf - Read/Download File
sediment transport, delta growth and sedimentation in lake
Little Ice Age, uncovered a proglacial lake during. 1936-1967. ... lake can be regarded as a subglacial basin, which .... pended sediments produced by the glacier. In 1968 ... Annual layers of fine sediments, varves, could be identified at 1 1 locations. ... Usually, sediment ... annual transport may occur within 5-1 0 days during.
[ Ostrem_Nigardsbreen_sedimenttransport_2005.pdf - Read/Download File