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...
Main Authors: | , |
---|---|
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
|
Subjects: | |
Online Access: | https://hal.science/hal-00145005 |
id |
ftunivlyon1:oai:HAL:hal-00145005v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivlyon1:oai:HAL:hal-00145005v1 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, Christophe Bucher, Hugo 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 https://hal.science/hal-00145005 en eng HAL CCSD hal-00145005 https://hal.science/hal-00145005 eEarth https://hal.science/hal-00145005 eEarth, 2006, 1, pp.1-7 [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology info:eu-repo/semantics/article Journal articles 2006 ftunivlyon1 2024-05-27T14:45:15Z 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 HAL Lyon 1 (University Claude Bernard Lyon 1) Indian |
institution |
Open Polar |
collection |
HAL Lyon 1 (University Claude Bernard Lyon 1) |
op_collection_id |
ftunivlyon1 |
language |
English |
topic |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
spellingShingle |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Lécuyer, Christophe Bucher, Hugo Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere? |
topic_facet |
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
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, Christophe Bucher, Hugo |
author_facet |
Lécuyer, Christophe Bucher, Hugo |
author_sort |
Lécuyer, Christophe |
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-00145005 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
eEarth https://hal.science/hal-00145005 eEarth, 2006, 1, pp.1-7 |
op_relation |
hal-00145005 https://hal.science/hal-00145005 |
_version_ |
1802645452698419200 |