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Relict non-glacial surfaces in formerly glaciated landscapes: dynamic landform systems?
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology. (paleoglaciologi/paleoglaciology)
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology. (paleoglaciologi/paleoglaciology)
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology. (paleoglaciologi/paleoglaciology)
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology. (paleoglaciologi/paleoglaciology)
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2007 (English)In: Geophysical Research Abstracts, 2007Conference paper, Published paper (Refereed)
Abstract [en]

Relict non-glacial surfaces occur within many formerly glaciated landscapes and contain

important information on past surface processes and long-term landscape evolution

(Goodfellow, 2007). While cosmogenic dating has confirmed the antiquity of

relict non-glacial surfaces, the processes that contribute to their evolution and, consequently,

the time scales over which they develop remain poorly understood. Of particular

importance is the possibility that relict non-glacial surfaces may provide geomorphic

markers for the reconstruction of preglacial landscapes, which would allow

subsequent glacial erosion to be quantified. Furthermore, relict non-glacial surfaces

may also hold information on preglacial and interglacial environmental conditions.

An investigation of relict non-glacial surfaces was undertaken through remote sensing,

mapping and analysis of surfaces in a GIS, and regolith studies involving cosmogenic

dating-, grain size-, X-ray diffraction-, and X-ray fluorescence analyses. On

the basis of these on-going studies, we show that depending on spatial variables such

as bedrock lithology, slope, regolith thickness, and the abundance of fine matrix and

water some surfaces are denuding very slowly, while others display more rapid denudation.

High spatial variability in denudation rates results in changing surface morphologies

over time. Rather than being static preglacial remnants, relict non-glacial

surfaces are dynamic features that have evolved during the Quaternary. While reconstructions

of preglacial landscapes and subsequent quantifications of glacial erosion

from relict non-glacial surfaces remain valid, the Quaternary evolution of these surfaces

should also be considered.

Goodfellow B.W., 2007. Relict non-glacial surfaces in formerly glaciated landscapes.

Earth-Science Reviews, 80(1-2): 47-73.

Place, publisher, year, edition, pages
2007.
National Category
Physical Geography
Identifiers
URN: urn:nbn:se:su:diva-21102OAI: oai:DiVA.org:su-21102DiVA: diva2:187628
Available from: 2007-12-06 Created: 2007-12-06Bibliographically approved

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http://www.cosis.net/abstracts/EGU2007/05361/EGU2007-J-05361-1.pdf

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Goodfellow, BradleyStroeven, ArjenHättestrand, ClasKleman, JohanJansson, Krister
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Department of Physical Geography and Quaternary Geology
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