A comparison of the lichenometric and Schmidt hammer dating techniques based on data from the proglacial areas of some Icelandic glaciers

Evans, David J. A.; Archer, Stuart; Wilson, David Gordon

doi:10.1016/s0277-3791(98)00098-5

Cited by 136 publications

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“…Small areas of the fluted forelands, especially on the Blá-gilsjökull foreland, are characterized by discontinuous arcuate chains of low amplitude ridges (Figure 8), which are interpreted as overridden moraines (sensu Evans, Archer, & Wilson, 1999, 2009, 2015aEvans & Orton, 2014;Evans & Twigg, 2002;Krüger, 1994).…”

Section: Overridden Morainesmentioning

confidence: 99%

Snæfellsjökull volcano-centred ice cap landsystem, West Iceland

et al. 2016

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A 1:10,526 scale map of Snaefellsjökull and its forelands is presented as the first landsystem exemplar of volcano-centred ice caps, for application to understanding glacierized volcanic terrains globally. Mapping of surface materials and landforms was undertaken using orthorectified aerial photographs taken in 2002 and results of ground truth fieldwork in 2010. Nine natural surficial geology units were identified in addition to bedrock, glacier ice and made ground associated with pumice mining. The spatial distribution of landforms and sediments throughout the forelands comprises extensive areas of ice-cored moraine, developed at the limit of the Little Ice Age readvance and located distal to extensive areas of fluted till and glacially abraded bedrock with occasional eskers. This is a widely recognized landsystem signature typical of former polythermal snout conditions at the Little Ice Age maximum. Proglacially, thrust pumice sheets also occur on the east flanks of the volcano where pre-existing deformable materials were susceptible to thrust block development. ARTICLE HISTORY

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Section: Overridden Morainesmentioning

confidence: 99%

Snæfellsjökull volcano-centred ice cap landsystem, West Iceland

et al. 2016

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“…The moraines of Skálafellsjökull were in contact with the moraines of Heinabergsjökull and Fláajökull (Text- fig. 1) and the three glaciers created a single piedmont lobe in AD 1860-1870 according to Evans et al (1999).…”

Section: Glacial Forelands and Location Of Test Sitesmentioning

confidence: 99%

Application of the Handysurf E-35B electronic profilometer for the study of weathering micro-relief in glacier forelands in SE Iceland

Dąbski

2015

Acta Geologica Polonica

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ABSTRACT:Dąbski, M. 2015. Application of the Handysurf E-35B electronic profilometer for the study of weathering micro-relief in glacier forelands in SE Iceland. Acta Geologica Polonica, 65 (3), 389-401. Warszawa.This article presents the results of weathering micro-roughness measurements performed with the use of a Handysurf E-35B electronic profilometer, a new tool in geomorphological studies. Measurements were performed on glacially abraded basaltic surfaces within the Little Ice Age (LIA) glacial forelands of Hoffelsjökull, Fláajökull, Skálafellsjökull and Virkisjökull in Iceland. Results show a statistical increase in micro-roughness in a direction from the glacial termini to LIA moraines. However, a major change in the micro-roughness of basaltic surfaces only occurs during the first 80 to 100 years since the onset of subaerial weathering. Increase in rock surface micro-roughness is accompanied by an increase in weathering rind thickness and a decrease in Schmidt hammer R-values. Micro-roughness measurements with the use of the Handysurf E-35B can provide insights into initial rates of rock surface micro-relief development. The use of this instrument as a relative dating technique is limited to fine-grained rocks and decadal time-scales of weathering because of the limited range of measureable micro-relief amplitude.

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“…The contemporary shrinkage of the cryosphere is resulting in the recession of glaciers and the melting of permafrost on a global scale (Huber et al 2005), but has also led to a collaborative international effort to gather information on the contemporary behaviour of glaciers and rock glaciers (WGMS 2016;GAPHAZ 2017). This is accompanied by developments and discussions on dating (Hubbard & Glasser 2005), among which lichenometry and Schmidt hammer are very popular, but there are still different approaches to these methods (Winkler & Shakesby 1995;Evans et al 1999;Bradwell 2009;Dąbski 2007Dąbski , 2009Dąbski , 2014, which justifies our research in Kaunertal.…”

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confidence: 62%

Lichenometry and Schmidt hammer tests in the Kaunertal glacier foreland (Ötztal Alps) during the AMADEE-15 Mars Mission Simulation

Czempiński

Dąbski

2017

Miscellanea Geographica

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The aim of this article is to show the results of the lichenometrical and Schmidt hammer measurements performed in 2015 during the AMADEE-15 Mars Mission Simulation in the Ötztal Alps in order to test the capabilities of analogue astronauts and collect information on the geomorphic history of the study area since the Little Ice Age (LIA). The results obtained differ significantly from our expectations, which we attribute to differences in the field experience of participants and the astronauts' technical limitations in terms of mobility. However, the experiments proved that these methods are within the range of the astronauts' capabilities. Environmental factors, such as i) varied petrography, ii) varied number of thalli in test polygons, and iii) differences in topoclimatic conditions between the LIA moraine and the glacier front, further inhibited simple interpretation. The LIA maximum of the Kaunertal glacier occurred in AD 1850, and relative stabilization of the frontal part of the rock glacier occurred in AD 1711.

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A comparison of the lichenometric and Schmidt hammer dating techniques based on data from the proglacial areas of some Icelandic glaciers

Cited by 136 publications

References 0 publications

Snæfellsjökull volcano-centred ice cap landsystem, West Iceland

Snæfellsjökull volcano-centred ice cap landsystem, West Iceland

Application of the Handysurf E-35B electronic profilometer for the study of weathering micro-relief in glacier forelands in SE Iceland

Lichenometry and Schmidt hammer tests in the Kaunertal glacier foreland (Ötztal Alps) during the AMADEE-15 Mars Mission Simulation

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