U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a
Abstract Calcitic flowstones are present in fractures of a Pleistocene breccia near Innsbruck, Austria, and record periods of carbonate precipitation in the unsaturated zone between 101,500 ± 1500 and 70,300 ± 1800 yr, constrained by U-series disequilibrium dates. The occurrence of these speleothems...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1016/j.yqres.2006.03.002 2024-06-09T07:46:26+00:00 U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a Spötl, Christoph Mangini, Augusto 2006 http://dx.doi.org/10.1016/j.yqres.2006.03.002 http://api.elsevier.com/content/article/PII:S0033589406000457?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589406000457?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400004312 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 66, issue 1, page 167-175 ISSN 0033-5894 1096-0287 journal-article 2006 crcambridgeupr https://doi.org/10.1016/j.yqres.2006.03.002 2024-05-15T13:13:32Z Abstract Calcitic flowstones are present in fractures of a Pleistocene breccia near Innsbruck, Austria, and record periods of carbonate precipitation in the unsaturated zone between 101,500 ± 1500 and 70,300 ± 1800 yr, constrained by U-series disequilibrium dates. The occurrence of these speleothems, their low carbon isotopic composition, and the lack of infiltrated siliciclastic material demonstrate that the central Inn valley – which harbored one of the most extensive valley glaciers during the last glacial maximum – was ice-free during Marine Isotope Stages 5c to 5a. Climatically warm periods are separated by distinct drops in the oxygen isotopic composition of the speleothem calcite, attributed to strong and possibly seasonally biased atmospheric cooling. During these intervening stadials, which mirror those identified in the Greenland ice cores and marine sea-surface temperature records, calcite deposition apparently came to a halt, but the Inn Valley remained ice-free. The youngest calcite layer formed between ∼74,000 and ∼70,000 yr and places a maximum age limit on the likely expansion of alpine glaciers during the Marine Isotope Stage 5/4 transition, consistent with other speleothem records. Article in Journal/Newspaper Greenland Greenland ice cores Cambridge University Press Greenland Quaternary Research 66 1 167 175 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Calcitic flowstones are present in fractures of a Pleistocene breccia near Innsbruck, Austria, and record periods of carbonate precipitation in the unsaturated zone between 101,500 ± 1500 and 70,300 ± 1800 yr, constrained by U-series disequilibrium dates. The occurrence of these speleothems, their low carbon isotopic composition, and the lack of infiltrated siliciclastic material demonstrate that the central Inn valley – which harbored one of the most extensive valley glaciers during the last glacial maximum – was ice-free during Marine Isotope Stages 5c to 5a. Climatically warm periods are separated by distinct drops in the oxygen isotopic composition of the speleothem calcite, attributed to strong and possibly seasonally biased atmospheric cooling. During these intervening stadials, which mirror those identified in the Greenland ice cores and marine sea-surface temperature records, calcite deposition apparently came to a halt, but the Inn Valley remained ice-free. The youngest calcite layer formed between ∼74,000 and ∼70,000 yr and places a maximum age limit on the likely expansion of alpine glaciers during the Marine Isotope Stage 5/4 transition, consistent with other speleothem records. |
format |
Article in Journal/Newspaper |
author |
Spötl, Christoph Mangini, Augusto |
spellingShingle |
Spötl, Christoph Mangini, Augusto U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a |
author_facet |
Spötl, Christoph Mangini, Augusto |
author_sort |
Spötl, Christoph |
title |
U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a |
title_short |
U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a |
title_full |
U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a |
title_fullStr |
U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a |
title_full_unstemmed |
U/Th age constraints on the absence of ice in the central Inn Valley (eastern Alps, Austria) during Marine Isotope Stages 5c to 5a |
title_sort |
u/th age constraints on the absence of ice in the central inn valley (eastern alps, austria) during marine isotope stages 5c to 5a |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1016/j.yqres.2006.03.002 http://api.elsevier.com/content/article/PII:S0033589406000457?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589406000457?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400004312 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores |
genre_facet |
Greenland Greenland ice cores |
op_source |
Quaternary Research volume 66, issue 1, page 167-175 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2006.03.002 |
container_title |
Quaternary Research |
container_volume |
66 |
container_issue |
1 |
container_start_page |
167 |
op_container_end_page |
175 |
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1801376285660807168 |