Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard
On the northern coast of the Hornsund fjord at SW Svalbard, numerous rock block accumulations flank the foot of Rotjesfjellet ridge. Whereas these accumulations are widely described as rock glaciers, this study shows that other factors also influence formation of these landforms. In this study, morp...
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ftczacademyscien:oai:asep.lib.cas.cz:CavUnEpca/0467026 2024-02-11T10:01:28+01:00 Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard Hartvich, F. (Filip) Blahůt, J. (Jan) Stemberk, J. (Josef) 2017 https://doi.org/10.1016/j.geomorph.2016.10.008 http://hdl.handle.net/11104/0272940 eng eng doi:10.1016/j.geomorph.2016.10.008 urn:pissn: 0169-555x urn:eissn: 1872-695x http://hdl.handle.net/11104/0272940 ERT TLS (LiDAR) lichenometry morphometry rock avalanche rock glacier Schmidt hammer Svalbard Hornsund info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftczacademyscien https://doi.org/10.1016/j.geomorph.2016.10.008 2024-01-16T17:17:10Z On the northern coast of the Hornsund fjord at SW Svalbard, numerous rock block accumulations flank the foot of Rotjesfjellet ridge. Whereas these accumulations are widely described as rock glaciers, this study shows that other factors also influence formation of these landforms. In this study, morphometric profiling and terrain analyses, lichenometry, optical granulometry, Schmidt hammer measurements, geophysical measurements using electric resistivity tomography, geodetic measurements using terrestrial LiDAR and rockfall modelling were used to clarify the formation of one unusual block accumulation. The morphometric analysis of a detailed (0.5 m) DEM and relief profiles showed distinctly different morphology of one of four studied block accumulations. The electric resistivity tomography revealed an ice core in the accumulation, the Schmidt hammer sampling helped to establish relatively younger age of the lobe-like left part of accumulation and finally, the lichenometry was employed to place the event on the approximate position on the timescale. In conclusion, the unusual block accumulation is a result of two consequent processes: first, a typical foothill rock glacier has developed, and consequently a large rock avalanche occurred, adding material and deforming the NW part of the accumulation. Based on the results of lichenometry, the rock avalanche was estimated to be 250 ± 50 years old. The study thus presents one of the few reported slope deformation events from the recently deglaciated Arctic areas. Article in Journal/Newspaper Arctic glacier Hornsund ice core Svalbard The Czech Academy of Sciences: Publication Activity (ASEP) Arctic Svalbard Hornsund ENVELOPE(15.865,15.865,76.979,76.979) Rotjesfjellet ENVELOPE(15.402,15.402,77.010,77.010) Geomorphology 276 244 256 |
institution |
Open Polar |
collection |
The Czech Academy of Sciences: Publication Activity (ASEP) |
op_collection_id |
ftczacademyscien |
language |
English |
topic |
ERT TLS (LiDAR) lichenometry morphometry rock avalanche rock glacier Schmidt hammer Svalbard Hornsund |
spellingShingle |
ERT TLS (LiDAR) lichenometry morphometry rock avalanche rock glacier Schmidt hammer Svalbard Hornsund Hartvich, F. (Filip) Blahůt, J. (Jan) Stemberk, J. (Josef) Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard |
topic_facet |
ERT TLS (LiDAR) lichenometry morphometry rock avalanche rock glacier Schmidt hammer Svalbard Hornsund |
description |
On the northern coast of the Hornsund fjord at SW Svalbard, numerous rock block accumulations flank the foot of Rotjesfjellet ridge. Whereas these accumulations are widely described as rock glaciers, this study shows that other factors also influence formation of these landforms. In this study, morphometric profiling and terrain analyses, lichenometry, optical granulometry, Schmidt hammer measurements, geophysical measurements using electric resistivity tomography, geodetic measurements using terrestrial LiDAR and rockfall modelling were used to clarify the formation of one unusual block accumulation. The morphometric analysis of a detailed (0.5 m) DEM and relief profiles showed distinctly different morphology of one of four studied block accumulations. The electric resistivity tomography revealed an ice core in the accumulation, the Schmidt hammer sampling helped to establish relatively younger age of the lobe-like left part of accumulation and finally, the lichenometry was employed to place the event on the approximate position on the timescale. In conclusion, the unusual block accumulation is a result of two consequent processes: first, a typical foothill rock glacier has developed, and consequently a large rock avalanche occurred, adding material and deforming the NW part of the accumulation. Based on the results of lichenometry, the rock avalanche was estimated to be 250 ± 50 years old. The study thus presents one of the few reported slope deformation events from the recently deglaciated Arctic areas. |
format |
Article in Journal/Newspaper |
author |
Hartvich, F. (Filip) Blahůt, J. (Jan) Stemberk, J. (Josef) |
author_facet |
Hartvich, F. (Filip) Blahůt, J. (Jan) Stemberk, J. (Josef) |
author_sort |
Hartvich, F. (Filip) |
title |
Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard |
title_short |
Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard |
title_full |
Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard |
title_fullStr |
Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard |
title_full_unstemmed |
Rock avalanche and rock glacier: A compound landform study from Hornsund, Svalbard |
title_sort |
rock avalanche and rock glacier: a compound landform study from hornsund, svalbard |
publishDate |
2017 |
url |
https://doi.org/10.1016/j.geomorph.2016.10.008 http://hdl.handle.net/11104/0272940 |
long_lat |
ENVELOPE(15.865,15.865,76.979,76.979) ENVELOPE(15.402,15.402,77.010,77.010) |
geographic |
Arctic Svalbard Hornsund Rotjesfjellet |
geographic_facet |
Arctic Svalbard Hornsund Rotjesfjellet |
genre |
Arctic glacier Hornsund ice core Svalbard |
genre_facet |
Arctic glacier Hornsund ice core Svalbard |
op_relation |
doi:10.1016/j.geomorph.2016.10.008 urn:pissn: 0169-555x urn:eissn: 1872-695x http://hdl.handle.net/11104/0272940 |
op_doi |
https://doi.org/10.1016/j.geomorph.2016.10.008 |
container_title |
Geomorphology |
container_volume |
276 |
container_start_page |
244 |
op_container_end_page |
256 |
_version_ |
1790597266110676992 |