Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere?
International audience Exceptional preservation of aragonite secreted by ammonites offers an opportunity to determine the seasonal temperature variations of Mesozoic surface waters. Ontogenetic profiles of carbon and oxygen isotope compositions have been obtained from the nacreous layer of a well-pr...
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ftunivlyon:oai:HAL:hal-00330771v1 2024-06-23T07:53:41+00:00 Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? Lécuyer, C. Bucher, H. PaleoEnvironnements et PaleobioSphere (PEPS) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Paläontologisches Institut und Museum Universität Zürich Zürich = University of Zurich (UZH) 2006-05-15 https://hal.science/hal-00330771 https://hal.science/hal-00330771/document https://hal.science/hal-00330771/file/eed-1-1-2006.pdf en eng HAL CCSD hal-00330771 https://hal.science/hal-00330771 https://hal.science/hal-00330771/document https://hal.science/hal-00330771/file/eed-1-1-2006.pdf info:eu-repo/semantics/OpenAccess eEarth Discussions https://hal.science/hal-00330771 eEarth Discussions, 2006, 1 (1), pp.1-19 [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2006 ftunivlyon 2024-05-27T14:43:46Z International audience Exceptional preservation of aragonite secreted by ammonites offers an opportunity to determine the seasonal temperature variations of Mesozoic surface waters. Ontogenetic profiles of carbon and oxygen isotope compositions have been obtained from the nacreous layer of a well-preserved Late Jurassic (Oxfordian) ammonite ( Perisphinctes ) from Madagascar. A similar range of oxygen isotope compositions was also obtained from an associated benthic bivalve ( Astarte ) which suggests the absence of sampling bias. Late Jurassic seasonal variations in the southern Hemisphere were close to 2.5°C and relatively weak when compared to the 2.5–6.5°C temperature range prevailing in the present-day Indian ocean at a paleolatitude of 40±1° S. According to the hypothesis of an ice cap-free Late Jurassic Earth, average sea surface temperatures may have been up to 7°C higher than now. Article in Journal/Newspaper Ice cap Université de Lyon: HAL Indian |
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Open Polar |
collection |
Université de Lyon: HAL |
op_collection_id |
ftunivlyon |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Lécuyer, C. Bucher, H. Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Exceptional preservation of aragonite secreted by ammonites offers an opportunity to determine the seasonal temperature variations of Mesozoic surface waters. Ontogenetic profiles of carbon and oxygen isotope compositions have been obtained from the nacreous layer of a well-preserved Late Jurassic (Oxfordian) ammonite ( Perisphinctes ) from Madagascar. A similar range of oxygen isotope compositions was also obtained from an associated benthic bivalve ( Astarte ) which suggests the absence of sampling bias. Late Jurassic seasonal variations in the southern Hemisphere were close to 2.5°C and relatively weak when compared to the 2.5–6.5°C temperature range prevailing in the present-day Indian ocean at a paleolatitude of 40±1° S. According to the hypothesis of an ice cap-free Late Jurassic Earth, average sea surface temperatures may have been up to 7°C higher than now. |
author2 |
PaleoEnvironnements et PaleobioSphere (PEPS) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Paläontologisches Institut und Museum Universität Zürich Zürich = University of Zurich (UZH) |
format |
Article in Journal/Newspaper |
author |
Lécuyer, C. Bucher, H. |
author_facet |
Lécuyer, C. Bucher, H. |
author_sort |
Lécuyer, C. |
title |
Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
title_short |
Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
title_full |
Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
title_fullStr |
Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
title_full_unstemmed |
Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
title_sort |
stable isotope compositions of a late jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00330771 https://hal.science/hal-00330771/document https://hal.science/hal-00330771/file/eed-1-1-2006.pdf |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
eEarth Discussions https://hal.science/hal-00330771 eEarth Discussions, 2006, 1 (1), pp.1-19 |
op_relation |
hal-00330771 https://hal.science/hal-00330771 https://hal.science/hal-00330771/document https://hal.science/hal-00330771/file/eed-1-1-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1802645453474365440 |