Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula
There is growing consensus that development of a semipermanent ice sheet on Antarctica began at or near the Eocene-Oligocene (E-O) boundary. Beyond ice-rafted debris in oceanic settings, however, direct evidence for a substantial ice sheet at this time has been limited and thus far restricted to Eas...
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ftvliz:oai:oma.vliz.be:231700 2023-05-15T13:33:16+02:00 Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula Ivany, L.C. Van Simaeys, S. Domack, E.W. Samson, S.D. 2006 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=231700 en eng info:eu-repo/semantics/altIdentifier/wos/000237312900015 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1130/G22383.1 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=231700 info:eu-repo/semantics/restrictedAccess %3Ci%3EGeology+%28Boulder+Colo.%29+34%285%29%3C%2Fi%3E%3A+377-380.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1130%2FG22383.1%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1130%2FG22383.1%3C%2Fa%3E Oligocene Dinoflagellata Antarctica info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2006 ftvliz https://doi.org/10.1130/G22383.1 2022-05-01T10:08:07Z There is growing consensus that development of a semipermanent ice sheet on Antarctica began at or near the Eocene-Oligocene (E-O) boundary. Beyond ice-rafted debris in oceanic settings, however, direct evidence for a substantial ice sheet at this time has been limited and thus far restricted to East Antarctica. It is unclear where glacier ice first accumulated and how extensive it was on the Antarctic continent in the earliest Oligocene. Sediments at the top of the Eocene marine shelf section on Seymour Island, Antarctic Peninsula, include glacial marine deposits and a lodgment till with clasts derived from a variety of rock units on the peninsula. Dinoflagellate biostratigraphy and strontium isotope stratigraphy indicate an age at or very close to the E-O boundary. Glacier ice extending to sea level in the northern peninsula at this time suggests the presence of a regionally extensive West Antarctica ice sheet, and thus an even more dramatic response to the forcing factors that facilitated high-latitude ice expansion in the earliest Oligocene. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Seymour Island West Antarctica Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic Antarctic Peninsula East Antarctica Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) The Antarctic West Antarctica Geology 34 5 377 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Oligocene Dinoflagellata Antarctica |
spellingShingle |
Oligocene Dinoflagellata Antarctica Ivany, L.C. Van Simaeys, S. Domack, E.W. Samson, S.D. Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula |
topic_facet |
Oligocene Dinoflagellata Antarctica |
description |
There is growing consensus that development of a semipermanent ice sheet on Antarctica began at or near the Eocene-Oligocene (E-O) boundary. Beyond ice-rafted debris in oceanic settings, however, direct evidence for a substantial ice sheet at this time has been limited and thus far restricted to East Antarctica. It is unclear where glacier ice first accumulated and how extensive it was on the Antarctic continent in the earliest Oligocene. Sediments at the top of the Eocene marine shelf section on Seymour Island, Antarctic Peninsula, include glacial marine deposits and a lodgment till with clasts derived from a variety of rock units on the peninsula. Dinoflagellate biostratigraphy and strontium isotope stratigraphy indicate an age at or very close to the E-O boundary. Glacier ice extending to sea level in the northern peninsula at this time suggests the presence of a regionally extensive West Antarctica ice sheet, and thus an even more dramatic response to the forcing factors that facilitated high-latitude ice expansion in the earliest Oligocene. |
format |
Article in Journal/Newspaper |
author |
Ivany, L.C. Van Simaeys, S. Domack, E.W. Samson, S.D. |
author_facet |
Ivany, L.C. Van Simaeys, S. Domack, E.W. Samson, S.D. |
author_sort |
Ivany, L.C. |
title |
Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula |
title_short |
Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula |
title_full |
Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula |
title_fullStr |
Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula |
title_full_unstemmed |
Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula |
title_sort |
evidence for an earliest oligocene ice sheet on the antarctic peninsula |
publishDate |
2006 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=231700 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula East Antarctica Seymour Seymour Island The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica Seymour Seymour Island The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Seymour Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Seymour Island West Antarctica |
op_source |
%3Ci%3EGeology+%28Boulder+Colo.%29+34%285%29%3C%2Fi%3E%3A+377-380.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1130%2FG22383.1%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1130%2FG22383.1%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000237312900015 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1130/G22383.1 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=231700 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1130/G22383.1 |
container_title |
Geology |
container_volume |
34 |
container_issue |
5 |
container_start_page |
377 |
_version_ |
1766040832708706304 |