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...
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ftunivsussexfig:oai:figshare.com:article/25020440 2024-02-11T10:00:53+01:00 Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia Juan Pedro Rodríguez-López Carlos L Liesa Aránzazu Luzón Arsenio Muñoz María J Mayayo Julian Murton Ana R Soria 2024-01-01T00:00:00Z https://figshare.com/articles/journal_contribution/Ice-rafted_dropstones_at_midlatitudes_in_the_Cretaceous_of_continental_Iberia/25020440 unknown 10779/uos.25020440.v1 https://figshare.com/articles/journal_contribution/Ice-rafted_dropstones_at_midlatitudes_in_the_Cretaceous_of_continental_Iberia/25020440 CC BY 4.0 Earth sciences Geology Physical geography and environmental geoscience 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 04 Earth Sciences Geochemistry & Geophysics Text Journal contribution 2024 ftunivsussexfig 2024-01-25T00:14:40Z 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 University of Sussex: Figshare Arctic Canada |
institution |
Open Polar |
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University of Sussex: Figshare |
op_collection_id |
ftunivsussexfig |
language |
unknown |
topic |
Earth sciences Geology Physical geography and environmental geoscience 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 04 Earth Sciences Geochemistry & Geophysics |
spellingShingle |
Earth sciences Geology Physical geography and environmental geoscience 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 04 Earth Sciences Geochemistry & Geophysics Juan Pedro Rodríguez-López Carlos L Liesa Aránzazu Luzón Arsenio Muñoz María J Mayayo Julian Murton Ana R Soria Ice-rafted dropstones at midlatitudes in the Cretaceous of continental Iberia |
topic_facet |
Earth sciences Geology Physical geography and environmental geoscience 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 04 Earth Sciences Geochemistry & Geophysics |
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 |
Juan Pedro Rodríguez-López Carlos L Liesa Aránzazu Luzón Arsenio Muñoz María J Mayayo Julian Murton Ana R Soria |
author_facet |
Juan Pedro Rodríguez-López Carlos L Liesa Aránzazu Luzón Arsenio Muñoz María J Mayayo Julian Murton Ana R Soria |
author_sort |
Juan Pedro Rodríguez-López |
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 |
https://figshare.com/articles/journal_contribution/Ice-rafted_dropstones_at_midlatitudes_in_the_Cretaceous_of_continental_Iberia/25020440 |
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 |
10779/uos.25020440.v1 https://figshare.com/articles/journal_contribution/Ice-rafted_dropstones_at_midlatitudes_in_the_Cretaceous_of_continental_Iberia/25020440 |
op_rights |
CC BY 4.0 |
_version_ |
1790596606106533888 |