Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica
ABSTRACT A 166 m thick Plio‐Pleistocene sequence of glacial sediments has been cored in Ferrar Fiord in the southwestern corner of the Ross Sea, Antarctica. The core has the following lithofacies: massive diamictite (33% of the core; interpreted as lodgement or waterlain till), weakly stratified dia...
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crwiley:10.1111/j.1365-3091.1992.tb01025.x 2024-06-02T07:57:34+00:00 Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica BARRETT, P. J. HAMBREY, M. J. 1992 http://dx.doi.org/10.1111/j.1365-3091.1992.tb01025.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3091.1992.tb01025.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3091.1992.tb01025.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Sedimentology volume 39, issue 1, page 109-123 ISSN 0037-0746 1365-3091 journal-article 1992 crwiley https://doi.org/10.1111/j.1365-3091.1992.tb01025.x 2024-05-03T10:50:37Z ABSTRACT A 166 m thick Plio‐Pleistocene sequence of glacial sediments has been cored in Ferrar Fiord in the southwestern corner of the Ross Sea, Antarctica. The core has the following lithofacies: massive diamictite (33% of the core; interpreted as lodgement or waterlain till), weakly stratified diamictite (25%; waterlain till or proximal glaciomarine sediment), well‐stratified diamictite (8%; proximal glaciomarine or glaciolacustrine sediment), sandstone (25%; sand of aeolian or supraglacial origin), mudstone(7%; derived from subglacial debris and transported offshore in suspension), and minor amounts of rhythmite and tuff. The range of facies in this polar setting differs from those normally found in subpolar and temperate glacier fiord settings in the high proportion of aeolian‐derived sand and the low proportion of mudstone facies. The core can be divided into two sequences based on composition and texture. The sequence from 162 to 100 mbsf (metres below the sea floor) comprises alternations of diamictite dominated by basement lithologies and thin marine mudstone beds. It is Pliocene in age (4.9–2.0 Ma) and records several advances and retreats of ice through the Transantarctic Mountains and across the drill site from the west. The sequence from 100 mbsf to the sea floor, of Pleistocene age, consists of alternations of diamictite, interpreted as lodgement and waterlain till, and sandstone of aeolian origin deposited in a glaciolacustrine setting, similar to ice‐covered lakes in the Dry Valleys today. These sediments have a high volcanic component, and hence are thought to have been derived by the grounding and advance of the Ross Ice Shelf from the east past volcanic Ross Island. This change in source is attributed to the rising Transantarctic Mountains increasingly containing East Antarctic ice. The Pleistocene sequence above 100 mbsf clearly represents polar glacial sedimentation, with alternations of till and glaciolacustrine sand. Mudstones from the Pliocene sequence beneath include palynomorphs, ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf Ross Island Ross Sea Wiley Online Library Antarctic Glacier Fiord ENVELOPE(-89.483,-89.483,78.369,78.369) Ross Ice Shelf Ross Island Ross Sea Transantarctic Mountains Sedimentology 39 1 109 123 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT A 166 m thick Plio‐Pleistocene sequence of glacial sediments has been cored in Ferrar Fiord in the southwestern corner of the Ross Sea, Antarctica. The core has the following lithofacies: massive diamictite (33% of the core; interpreted as lodgement or waterlain till), weakly stratified diamictite (25%; waterlain till or proximal glaciomarine sediment), well‐stratified diamictite (8%; proximal glaciomarine or glaciolacustrine sediment), sandstone (25%; sand of aeolian or supraglacial origin), mudstone(7%; derived from subglacial debris and transported offshore in suspension), and minor amounts of rhythmite and tuff. The range of facies in this polar setting differs from those normally found in subpolar and temperate glacier fiord settings in the high proportion of aeolian‐derived sand and the low proportion of mudstone facies. The core can be divided into two sequences based on composition and texture. The sequence from 162 to 100 mbsf (metres below the sea floor) comprises alternations of diamictite dominated by basement lithologies and thin marine mudstone beds. It is Pliocene in age (4.9–2.0 Ma) and records several advances and retreats of ice through the Transantarctic Mountains and across the drill site from the west. The sequence from 100 mbsf to the sea floor, of Pleistocene age, consists of alternations of diamictite, interpreted as lodgement and waterlain till, and sandstone of aeolian origin deposited in a glaciolacustrine setting, similar to ice‐covered lakes in the Dry Valleys today. These sediments have a high volcanic component, and hence are thought to have been derived by the grounding and advance of the Ross Ice Shelf from the east past volcanic Ross Island. This change in source is attributed to the rising Transantarctic Mountains increasingly containing East Antarctic ice. The Pleistocene sequence above 100 mbsf clearly represents polar glacial sedimentation, with alternations of till and glaciolacustrine sand. Mudstones from the Pliocene sequence beneath include palynomorphs, ... |
format |
Article in Journal/Newspaper |
author |
BARRETT, P. J. HAMBREY, M. J. |
spellingShingle |
BARRETT, P. J. HAMBREY, M. J. Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica |
author_facet |
BARRETT, P. J. HAMBREY, M. J. |
author_sort |
BARRETT, P. J. |
title |
Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica |
title_short |
Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica |
title_full |
Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica |
title_fullStr |
Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica |
title_full_unstemmed |
Plio‐Pleistocene sedimentation in Ferrar Fiord, Antarctica |
title_sort |
plio‐pleistocene sedimentation in ferrar fiord, antarctica |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1111/j.1365-3091.1992.tb01025.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3091.1992.tb01025.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3091.1992.tb01025.x |
long_lat |
ENVELOPE(-89.483,-89.483,78.369,78.369) |
geographic |
Antarctic Glacier Fiord Ross Ice Shelf Ross Island Ross Sea Transantarctic Mountains |
geographic_facet |
Antarctic Glacier Fiord Ross Ice Shelf Ross Island Ross Sea Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf Ross Island Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ross Ice Shelf Ross Island Ross Sea |
op_source |
Sedimentology volume 39, issue 1, page 109-123 ISSN 0037-0746 1365-3091 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3091.1992.tb01025.x |
container_title |
Sedimentology |
container_volume |
39 |
container_issue |
1 |
container_start_page |
109 |
op_container_end_page |
123 |
_version_ |
1800740731993718784 |