Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island
The onshore record of Cenozoic glaciation in the Antarctic Peninsula region is limited to a number of isolated localities on Alexander Island, the South Shetland Islands and in the James Ross Island area. In the James Ross Island area, Late Cretaceous sedimentary rocks are unconformably overlain by...
Published in: | Geological Magazine |
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Language: | English |
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Cambridge University Press (CUP)
1997
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Online Access: | http://dx.doi.org/10.1017/s0016756897007796 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756897007796 |
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crcambridgeupr:10.1017/s0016756897007796 2024-06-23T07:45:15+00:00 Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island PIRRIE, D. CRAME, J. A. RIDING, J. B. BUTCHER, A. R. TAYLOR, P. D. 1997 http://dx.doi.org/10.1017/s0016756897007796 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756897007796 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 134, issue 6, page 745-762 ISSN 0016-7568 1469-5081 journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0016756897007796 2024-06-05T04:03:45Z The onshore record of Cenozoic glaciation in the Antarctic Peninsula region is limited to a number of isolated localities on Alexander Island, the South Shetland Islands and in the James Ross Island area. In the James Ross Island area, Late Cretaceous sedimentary rocks are unconformably overlain by a unit of diamictites and tuffs, which occur at the base of the James Ross Island Volcanic Group. These rocks are here defined as the Hobbs Glacier Formation, and on the basis of palynological studies are assigned to a Miocene (?late Miocene) age. The diamictites are interpreted as representing glaciomarine sedimentation close to the grounding line of either a floating ice shelf or a grounded tidewater glacier in a marine basin. Provenance studies indicate that the glacier was flowing from the Antarctic Peninsula towards the southeast. Volcanic tuffs conformably overlie the diamictites and are interpreted as representing deposition in a periglacial delta front setting in either a marine or non-marine basin, away from direct glacial influence. The Hobbs Glacier Formation and overlying James Ross Island Volcanic Group help to enhance our understanding of the Neogene glacial chronology of West Antarctica. Article in Journal/Newspaper Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf James Ross Island Ross Island South Shetland Islands Tidewater West Antarctica Cambridge University Press Antarctic The Antarctic Antarctic Peninsula West Antarctica South Shetland Islands Ross Island Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) Hobbs ENVELOPE(-57.500,-57.500,-64.300,-64.300) Geological Magazine 134 6 745 762 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The onshore record of Cenozoic glaciation in the Antarctic Peninsula region is limited to a number of isolated localities on Alexander Island, the South Shetland Islands and in the James Ross Island area. In the James Ross Island area, Late Cretaceous sedimentary rocks are unconformably overlain by a unit of diamictites and tuffs, which occur at the base of the James Ross Island Volcanic Group. These rocks are here defined as the Hobbs Glacier Formation, and on the basis of palynological studies are assigned to a Miocene (?late Miocene) age. The diamictites are interpreted as representing glaciomarine sedimentation close to the grounding line of either a floating ice shelf or a grounded tidewater glacier in a marine basin. Provenance studies indicate that the glacier was flowing from the Antarctic Peninsula towards the southeast. Volcanic tuffs conformably overlie the diamictites and are interpreted as representing deposition in a periglacial delta front setting in either a marine or non-marine basin, away from direct glacial influence. The Hobbs Glacier Formation and overlying James Ross Island Volcanic Group help to enhance our understanding of the Neogene glacial chronology of West Antarctica. |
format |
Article in Journal/Newspaper |
author |
PIRRIE, D. CRAME, J. A. RIDING, J. B. BUTCHER, A. R. TAYLOR, P. D. |
spellingShingle |
PIRRIE, D. CRAME, J. A. RIDING, J. B. BUTCHER, A. R. TAYLOR, P. D. Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island |
author_facet |
PIRRIE, D. CRAME, J. A. RIDING, J. B. BUTCHER, A. R. TAYLOR, P. D. |
author_sort |
PIRRIE, D. |
title |
Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island |
title_short |
Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island |
title_full |
Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island |
title_fullStr |
Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island |
title_full_unstemmed |
Miocene glaciomarine sedimentation in the northern Antarctic Peninsula region: the stratigraphy and sedimentology of the Hobbs Glacier Formation, James Ross Island |
title_sort |
miocene glaciomarine sedimentation in the northern antarctic peninsula region: the stratigraphy and sedimentology of the hobbs glacier formation, james ross island |
publisher |
Cambridge University Press (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0016756897007796 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756897007796 |
long_lat |
ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-57.500,-57.500,-64.300,-64.300) |
geographic |
Antarctic The Antarctic Antarctic Peninsula West Antarctica South Shetland Islands Ross Island Alexander Island Hobbs |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula West Antarctica South Shetland Islands Ross Island Alexander Island Hobbs |
genre |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf James Ross Island Ross Island South Shetland Islands Tidewater West Antarctica |
genre_facet |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf James Ross Island Ross Island South Shetland Islands Tidewater West Antarctica |
op_source |
Geological Magazine volume 134, issue 6, page 745-762 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756897007796 |
container_title |
Geological Magazine |
container_volume |
134 |
container_issue |
6 |
container_start_page |
745 |
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762 |
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1802638557606576128 |