Scratching the surface: Footprint of a late Carboniferous ice sheet
International audience Field observations in conjunction with aerial images from an unmanned aerial vehicle were used to create the first map of a glacial unconformity underlying the late Carboniferous Dwyka Group of South Africa. Crosscutting relationships reveal that the glacial unconformity at Oo...
Published in: | Geology |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
|
Subjects: | |
Online Access: | https://hal.science/hal-02363937 https://hal.science/hal-02363937/document https://hal.science/hal-02363937/file/Le%20Heron%20et%20al.,%202019%20Glacial%20Pavement%20LPIA%20Northern%20Cape%20GeologyG46590.pdf https://doi.org/10.1130/G46590.1 |
id |
ftunivrennes1hal:oai:HAL:hal-02363937v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivrennes1hal:oai:HAL:hal-02363937v1 2024-02-11T10:04:50+01:00 Scratching the surface: Footprint of a late Carboniferous ice sheet Le Heron, D, P Dietrich, Pierre Busfield, M, E Kettler, C Bermanschläger, S. Grasemann, B. Universität Wien University of Johannesburg South Africa (UJ) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Aberystwyth University 2019-11-01 https://hal.science/hal-02363937 https://hal.science/hal-02363937/document https://hal.science/hal-02363937/file/Le%20Heron%20et%20al.,%202019%20Glacial%20Pavement%20LPIA%20Northern%20Cape%20GeologyG46590.pdf https://doi.org/10.1130/G46590.1 en eng HAL CCSD Geological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1130/G46590.1 hal-02363937 https://hal.science/hal-02363937 https://hal.science/hal-02363937/document https://hal.science/hal-02363937/file/Le%20Heron%20et%20al.,%202019%20Glacial%20Pavement%20LPIA%20Northern%20Cape%20GeologyG46590.pdf doi:10.1130/G46590.1 info:eu-repo/semantics/OpenAccess ISSN: 0091-7613 EISSN: 1943-2682 Geology https://hal.science/hal-02363937 Geology, 2019, 47 (11), pp.1034-1038. ⟨10.1130/G46590.1⟩ [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy info:eu-repo/semantics/article Journal articles 2019 ftunivrennes1hal https://doi.org/10.1130/G46590.1 2024-01-23T23:52:26Z International audience Field observations in conjunction with aerial images from an unmanned aerial vehicle were used to create the first map of a glacial unconformity underlying the late Carboniferous Dwyka Group of South Africa. Crosscutting relationships reveal that the glacial unconformity at Oorlogskloof, in which flutes, grooves, and striae were ploughed into unconsolidated sand, formed in a three-phased process charting a periodic shift in the locus of subglacial erosion. The unconformity formed by a periodically decoupled ice sheet in a probable tidewater setting. This model contrasts with earlier views that the structures simply record progressive ice-margin liftoff during transgression, and they provide unique insight into the complex temporal development of a 300 Ma subglacial environment. Article in Journal/Newspaper Ice Sheet Université de Rennes 1: Publications scientifiques (HAL) Geology 47 11 1034 1038 |
institution |
Open Polar |
collection |
Université de Rennes 1: Publications scientifiques (HAL) |
op_collection_id |
ftunivrennes1hal |
language |
English |
topic |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
spellingShingle |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy Le Heron, D, P Dietrich, Pierre Busfield, M, E Kettler, C Bermanschläger, S. Grasemann, B. Scratching the surface: Footprint of a late Carboniferous ice sheet |
topic_facet |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy |
description |
International audience Field observations in conjunction with aerial images from an unmanned aerial vehicle were used to create the first map of a glacial unconformity underlying the late Carboniferous Dwyka Group of South Africa. Crosscutting relationships reveal that the glacial unconformity at Oorlogskloof, in which flutes, grooves, and striae were ploughed into unconsolidated sand, formed in a three-phased process charting a periodic shift in the locus of subglacial erosion. The unconformity formed by a periodically decoupled ice sheet in a probable tidewater setting. This model contrasts with earlier views that the structures simply record progressive ice-margin liftoff during transgression, and they provide unique insight into the complex temporal development of a 300 Ma subglacial environment. |
author2 |
Universität Wien University of Johannesburg South Africa (UJ) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Aberystwyth University |
format |
Article in Journal/Newspaper |
author |
Le Heron, D, P Dietrich, Pierre Busfield, M, E Kettler, C Bermanschläger, S. Grasemann, B. |
author_facet |
Le Heron, D, P Dietrich, Pierre Busfield, M, E Kettler, C Bermanschläger, S. Grasemann, B. |
author_sort |
Le Heron, D, P |
title |
Scratching the surface: Footprint of a late Carboniferous ice sheet |
title_short |
Scratching the surface: Footprint of a late Carboniferous ice sheet |
title_full |
Scratching the surface: Footprint of a late Carboniferous ice sheet |
title_fullStr |
Scratching the surface: Footprint of a late Carboniferous ice sheet |
title_full_unstemmed |
Scratching the surface: Footprint of a late Carboniferous ice sheet |
title_sort |
scratching the surface: footprint of a late carboniferous ice sheet |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02363937 https://hal.science/hal-02363937/document https://hal.science/hal-02363937/file/Le%20Heron%20et%20al.,%202019%20Glacial%20Pavement%20LPIA%20Northern%20Cape%20GeologyG46590.pdf https://doi.org/10.1130/G46590.1 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0091-7613 EISSN: 1943-2682 Geology https://hal.science/hal-02363937 Geology, 2019, 47 (11), pp.1034-1038. ⟨10.1130/G46590.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1130/G46590.1 hal-02363937 https://hal.science/hal-02363937 https://hal.science/hal-02363937/document https://hal.science/hal-02363937/file/Le%20Heron%20et%20al.,%202019%20Glacial%20Pavement%20LPIA%20Northern%20Cape%20GeologyG46590.pdf doi:10.1130/G46590.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1130/G46590.1 |
container_title |
Geology |
container_volume |
47 |
container_issue |
11 |
container_start_page |
1034 |
op_container_end_page |
1038 |
_version_ |
1790601593882673152 |