Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia
The Cretaceous is widely considered to have been a period subjected to super-greenhouse conditions. Here, we provide multiscale sedimentologic evidence of glaciers developing at mid-paleolatitudes (∼45°N) in continental Iberia during the Hauterivian cold snap. Striated and faceted ice-rafted glacial...
Published in: | Geology |
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Language: | English |
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2024
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Online Access: | http://zaguan.unizar.es/record/127978 https://doi.org/10.1130/G51725.1 |
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ftunivzaraaneto:oai:zaguan.unizar.es:127978 2024-02-11T10:00:49+01:00 Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia Rodríguez-López, Juan Pedro Liesa, Carlos L. Luzón, Aránzazu Muñoz, Arsenio Mayayo, María J. Murton, Julian B. Soria, Ana R. 2024 application/pdf http://zaguan.unizar.es/record/127978 https://doi.org/10.1130/G51725.1 eng eng info:eu-repo/grantAgreement/ES/AEI/PID2019-108705GB-I00 info:eu-repo/grantAgreement/ES/DGA/E32-23R http://zaguan.unizar.es/record/127978 doi:10.1130/G51725.1 All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2024 ftunivzaraaneto https://doi.org/10.1130/G51725.1 2024-01-24T00:26:27Z The Cretaceous is widely considered to have been a period subjected to super-greenhouse conditions. Here, we provide multiscale sedimentologic evidence of glaciers developing at mid-paleolatitudes (∼45°N) in continental Iberia during the Hauterivian cold snap. Striated and faceted ice-rafted glacial dropstones (cobble to boulder size) and striated and grooved silt- to sand-sized grains (ice-rafted debris [IRD]) occur in a lacustrine sequence of the Enciso Group in the eastern Cameros Basin, Spain. The ice-rafted materials constitute the first evidence reported for a Cretaceous continental cryospheric record in Europe, and they are attributed to calving of glacier snouts, releasing icebergs into an ice-contact lake. The sedimentary succession resembles glacial-deglacial records in lakes overridden by the late Pleistocene Laurentide Ice Sheet in eastern Arctic Canada. The Iberian glacial succession was coeval with plateau permafrost in Asia and IRD records in the Arctic and Australia, revealing a stronger than previously thought cryosphere during the global Hauterivian cold snap. Article in Journal/Newspaper Arctic glacier* Ice Ice Sheet Iceberg* permafrost Digital Repository of University of Zaragoza (ZAGUAN) Arctic Canada Geology |
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Open Polar |
collection |
Digital Repository of University of Zaragoza (ZAGUAN) |
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ftunivzaraaneto |
language |
English |
description |
The Cretaceous is widely considered to have been a period subjected to super-greenhouse conditions. Here, we provide multiscale sedimentologic evidence of glaciers developing at mid-paleolatitudes (∼45°N) in continental Iberia during the Hauterivian cold snap. Striated and faceted ice-rafted glacial dropstones (cobble to boulder size) and striated and grooved silt- to sand-sized grains (ice-rafted debris [IRD]) occur in a lacustrine sequence of the Enciso Group in the eastern Cameros Basin, Spain. The ice-rafted materials constitute the first evidence reported for a Cretaceous continental cryospheric record in Europe, and they are attributed to calving of glacier snouts, releasing icebergs into an ice-contact lake. The sedimentary succession resembles glacial-deglacial records in lakes overridden by the late Pleistocene Laurentide Ice Sheet in eastern Arctic Canada. The Iberian glacial succession was coeval with plateau permafrost in Asia and IRD records in the Arctic and Australia, revealing a stronger than previously thought cryosphere during the global Hauterivian cold snap. |
format |
Article in Journal/Newspaper |
author |
Rodríguez-López, Juan Pedro Liesa, Carlos L. Luzón, Aránzazu Muñoz, Arsenio Mayayo, María J. Murton, Julian B. Soria, Ana R. |
spellingShingle |
Rodríguez-López, Juan Pedro Liesa, Carlos L. Luzón, Aránzazu Muñoz, Arsenio Mayayo, María J. Murton, Julian B. Soria, Ana R. Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia |
author_facet |
Rodríguez-López, Juan Pedro Liesa, Carlos L. Luzón, Aránzazu Muñoz, Arsenio Mayayo, María J. Murton, Julian B. Soria, Ana R. |
author_sort |
Rodríguez-López, Juan Pedro |
title |
Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia |
title_short |
Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia |
title_full |
Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia |
title_fullStr |
Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia |
title_full_unstemmed |
Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia |
title_sort |
ice-rafted dropstones at midlatitudes in the cretaceous of continental iberia |
publishDate |
2024 |
url |
http://zaguan.unizar.es/record/127978 https://doi.org/10.1130/G51725.1 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic glacier* Ice Ice Sheet Iceberg* permafrost |
genre_facet |
Arctic glacier* Ice Ice Sheet Iceberg* permafrost |
op_relation |
info:eu-repo/grantAgreement/ES/AEI/PID2019-108705GB-I00 info:eu-repo/grantAgreement/ES/DGA/E32-23R http://zaguan.unizar.es/record/127978 doi:10.1130/G51725.1 |
op_rights |
All rights reserved http://www.europeana.eu/rights/rr-f/ |
op_doi |
https://doi.org/10.1130/G51725.1 |
container_title |
Geology |
_version_ |
1790596547471212544 |