Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering
In order to contribute to the reconstruction of the deglaciation history of the Marguerite Bay area (similar to 68 degrees S, Maritime Antarctic) and to estimate the rock weathering rate in this Antarctic sector, 28 sites (7 on Rothera Point and 21 on Anchorage Island) were characterised using Schmi...
Published in: | Geomorphology |
---|---|
Main Authors: | , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/11383/1782916 https://doi.org/10.1016/j.geomorph.2011.12.015 |
id |
ftuninsubriairis:oai:irinsubria.uninsubria.it:11383/1782916 |
---|---|
record_format |
openpolar |
spelling |
ftuninsubriairis:oai:irinsubria.uninsubria.it:11383/1782916 2024-04-14T08:00:55+00:00 Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering GUGLIELMIN, MAURO CANNONE, NICOLETTA Worland M.R. Convey P. Guglielmin, Mauro Worland, M. R. Convey, P. Cannone, Nicoletta 2012 http://hdl.handle.net/11383/1782916 https://doi.org/10.1016/j.geomorph.2011.12.015 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000304334900005 volume:155 firstpage:34 lastpage:44 journal:GEOMORPHOLOGY http://hdl.handle.net/11383/1782916 doi:10.1016/j.geomorph.2011.12.015 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84860335538 Schmidt Hammer Rock weathering Lichens Holocene deglaciation Antarctica info:eu-repo/semantics/article 2012 ftuninsubriairis https://doi.org/10.1016/j.geomorph.2011.12.015 2024-03-21T18:57:22Z In order to contribute to the reconstruction of the deglaciation history of the Marguerite Bay area (similar to 68 degrees S, Maritime Antarctic) and to estimate the rock weathering rate in this Antarctic sector, 28 sites (7 on Rothera Point and 21 on Anchorage Island) were characterised using Schmidt Hammer values. The weathering effect of two of the most widespread species of macrolichens in this area (Usnea sphacelata and Umbilicaria decussata) was tested at 5 different sites on Rothera Point. Schmidt Hammer data, in conjunction with recent C-14 age, suggest a deglaciation age for the Marguerite Bay area of around 12 ka, and an average uplift rate of 5.4 mm year(-1) on Anchorage Island for the period between 3.3 and 5.2 ka. The weathering rates are extremely slow (e.g. three times slower than reported in Norway). Our data confirm that lichens exert a strong impact on weathering, decreasing the Schmidt Hammer R-values on lichenised surfaces by a factor of 3-4 compared to bare rock surfaces. The effect of lichens on weathering is mainly due to edaphic conditions and the type of the lichen involved rather the period of exposure. Article in Journal/Newspaper Anchorage Island Antarc* Antarctic Antarctica IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) Antarctic Anchorage Norway Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Rothera ENVELOPE(-68.130,-68.130,-67.568,-67.568) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) Rothera Point ENVELOPE(-68.133,-68.133,-67.567,-67.567) Bare Rock ENVELOPE(-45.589,-45.589,-60.704,-60.704) Anchorage Island ENVELOPE(-68.214,-68.214,-67.605,-67.605) Geomorphology 155-156 34 44 |
institution |
Open Polar |
collection |
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) |
op_collection_id |
ftuninsubriairis |
language |
unknown |
topic |
Schmidt Hammer Rock weathering Lichens Holocene deglaciation Antarctica |
spellingShingle |
Schmidt Hammer Rock weathering Lichens Holocene deglaciation Antarctica GUGLIELMIN, MAURO CANNONE, NICOLETTA Worland M.R. Convey P. Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering |
topic_facet |
Schmidt Hammer Rock weathering Lichens Holocene deglaciation Antarctica |
description |
In order to contribute to the reconstruction of the deglaciation history of the Marguerite Bay area (similar to 68 degrees S, Maritime Antarctic) and to estimate the rock weathering rate in this Antarctic sector, 28 sites (7 on Rothera Point and 21 on Anchorage Island) were characterised using Schmidt Hammer values. The weathering effect of two of the most widespread species of macrolichens in this area (Usnea sphacelata and Umbilicaria decussata) was tested at 5 different sites on Rothera Point. Schmidt Hammer data, in conjunction with recent C-14 age, suggest a deglaciation age for the Marguerite Bay area of around 12 ka, and an average uplift rate of 5.4 mm year(-1) on Anchorage Island for the period between 3.3 and 5.2 ka. The weathering rates are extremely slow (e.g. three times slower than reported in Norway). Our data confirm that lichens exert a strong impact on weathering, decreasing the Schmidt Hammer R-values on lichenised surfaces by a factor of 3-4 compared to bare rock surfaces. The effect of lichens on weathering is mainly due to edaphic conditions and the type of the lichen involved rather the period of exposure. |
author2 |
Guglielmin, Mauro Worland, M. R. Convey, P. Cannone, Nicoletta |
format |
Article in Journal/Newspaper |
author |
GUGLIELMIN, MAURO CANNONE, NICOLETTA Worland M.R. Convey P. |
author_facet |
GUGLIELMIN, MAURO CANNONE, NICOLETTA Worland M.R. Convey P. |
author_sort |
GUGLIELMIN, MAURO |
title |
Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering |
title_short |
Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering |
title_full |
Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering |
title_fullStr |
Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering |
title_full_unstemmed |
Schmidt Hammer studies in the maritime Antarctic: Application to dating Holocene deglaciation and estimating the effects of macrolichens on rock weathering |
title_sort |
schmidt hammer studies in the maritime antarctic: application to dating holocene deglaciation and estimating the effects of macrolichens on rock weathering |
publishDate |
2012 |
url |
http://hdl.handle.net/11383/1782916 https://doi.org/10.1016/j.geomorph.2011.12.015 |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-68.130,-68.130,-67.568,-67.568) ENVELOPE(-68.000,-68.000,-68.500,-68.500) ENVELOPE(-68.133,-68.133,-67.567,-67.567) ENVELOPE(-45.589,-45.589,-60.704,-60.704) ENVELOPE(-68.214,-68.214,-67.605,-67.605) |
geographic |
Antarctic Anchorage Norway Marguerite Rothera Marguerite Bay Rothera Point Bare Rock Anchorage Island |
geographic_facet |
Antarctic Anchorage Norway Marguerite Rothera Marguerite Bay Rothera Point Bare Rock Anchorage Island |
genre |
Anchorage Island Antarc* Antarctic Antarctica |
genre_facet |
Anchorage Island Antarc* Antarctic Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000304334900005 volume:155 firstpage:34 lastpage:44 journal:GEOMORPHOLOGY http://hdl.handle.net/11383/1782916 doi:10.1016/j.geomorph.2011.12.015 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84860335538 |
op_doi |
https://doi.org/10.1016/j.geomorph.2011.12.015 |
container_title |
Geomorphology |
container_volume |
155-156 |
container_start_page |
34 |
op_container_end_page |
44 |
_version_ |
1796304457581985792 |