Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica
Day Nunatak exposes an actively emergent stratigraphic section located on Snow Hill Island to the east of the Antarctic Peninsula. Strata exposed on Snow Hill Island were deposited in the James Ross Basin, which includes marine units of Cretaceous–Paleogene (K–Pg) age. Here we provide the first repo...
Published in: | Cretaceous Research |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
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Academic Press
2018
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Subjects: | |
Online Access: | https://eprints.qut.edu.au/123768/ |
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ftqueensland:oai:eprints.qut.edu.au:123768 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Queensland University of Technology: QUT ePrints |
op_collection_id |
ftqueensland |
language |
unknown |
topic |
Ammonite Antarctica Cretaceous Fossil James Ross Island |
spellingShingle |
Ammonite Antarctica Cretaceous Fossil James Ross Island Tobin, Thomas Flannery, David Sousa, Francis Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica |
topic_facet |
Ammonite Antarctica Cretaceous Fossil James Ross Island |
description |
Day Nunatak exposes an actively emergent stratigraphic section located on Snow Hill Island to the east of the Antarctic Peninsula. Strata exposed on Snow Hill Island were deposited in the James Ross Basin, which includes marine units of Cretaceous–Paleogene (K–Pg) age. Here we provide the first report of the sedimentology and paleontology of Day Nunatak, and place it into the broader stratigraphic context of the basin. Day Nunatak was previously unexplored due to difficulties accessing the site, and the historically poor exposure which has recently improved due to warming of the Antarctic Peninsula. Deposits exposed at Day Nunatak are assigned to the Karlsen Cliffs Member (KCM) of the Snow Hill Island Formation, and are better preserved than deposits at the type section of the KCM at Karlsen Cliffs, which has been altered by cross-cutting basaltic dikes. Correlation of lithostratigraphic and biostratigraphic data from Day Nunatak with other outcrops in the basin allows the section to be placed within a previously developed stratigraphic framework, and assigned an early Maastrichtian age. Our observations, and previous descriptions of the KCM, are consistent with a middle- to inner-shelf depositional environment below storm-wave base. Ammonites of the genus Gunnarites are very common, with other ammonite genera and benthic mollusks an order of magnitude less common. Stable carbon and oxygen isotope values obtained from bivalve shells are similar to values previously reported from Seymour Island, and suggest seawater temperatures of ∼7 °C. Measured bedding orientations suggest the presence of a structural offset between Day Nunatak and other sections exposed further north on Snow Hill Island. Day Nunatak preserves a similar depositional environment to deposits reported from the uppermost Maastrichtian on Seymour Island, and is the deeper-water equivalent of contemporaneous proximal sections reported from Vega Island. |
format |
Article in Journal/Newspaper |
author |
Tobin, Thomas Flannery, David Sousa, Francis |
author_facet |
Tobin, Thomas Flannery, David Sousa, Francis |
author_sort |
Tobin, Thomas |
title |
Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica |
title_short |
Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica |
title_full |
Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica |
title_fullStr |
Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica |
title_full_unstemmed |
Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica |
title_sort |
stratigraphy, sedimentology and paleontology of upper cretaceous deposits of day nunatak, snow hill island, antarctica |
publisher |
Academic Press |
publishDate |
2018 |
url |
https://eprints.qut.edu.au/123768/ |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-57.500,-57.500,-63.833,-63.833) ENVELOPE(76.070,76.070,-69.395,-69.395) ENVELOPE(-57.183,-57.183,-64.466,-64.466) ENVELOPE(-46.000,-46.000,-60.350,-60.350) ENVELOPE(-57.347,-57.347,-64.499,-64.499) ENVELOPE(-56.954,-56.954,-64.342,-64.342) ENVELOPE(-57.183,-57.183,-64.466,-64.466) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Ross Island Seymour Seymour Island Vega Island Hill Island Snow Hill Island Karlsen Day Nunatak Karlsen Cliffs Snow Hill |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Ross Island Seymour Seymour Island Vega Island Hill Island Snow Hill Island Karlsen Day Nunatak Karlsen Cliffs Snow Hill |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica James Ross Island Ross Island Seymour Island Snow Hill Island Vega Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica James Ross Island Ross Island Seymour Island Snow Hill Island Vega Island |
op_source |
Cretaceous Research |
op_relation |
https://eprints.qut.edu.au/123768/1/Day%20Nunatak%20Proof.pdf doi:10.1016/j.cretres.2017.12.006 Tobin, Thomas, Flannery, David, & Sousa, Francis (2018) Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica. Cretaceous Research, 84, pp. 407-419. https://eprints.qut.edu.au/123768/ Science & Engineering Faculty |
op_rights |
free_to_read Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
op_doi |
https://doi.org/10.1016/j.cretres.2017.12.006 |
container_title |
Cretaceous Research |
container_volume |
84 |
container_start_page |
407 |
op_container_end_page |
419 |
_version_ |
1789959674475315200 |
spelling |
ftqueensland:oai:eprints.qut.edu.au:123768 2024-02-04T09:55:37+01:00 Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica Tobin, Thomas Flannery, David Sousa, Francis 2018 application/pdf https://eprints.qut.edu.au/123768/ unknown Academic Press https://eprints.qut.edu.au/123768/1/Day%20Nunatak%20Proof.pdf doi:10.1016/j.cretres.2017.12.006 Tobin, Thomas, Flannery, David, & Sousa, Francis (2018) Stratigraphy, sedimentology and paleontology of Upper Cretaceous deposits of Day Nunatak, Snow Hill Island, Antarctica. Cretaceous Research, 84, pp. 407-419. https://eprints.qut.edu.au/123768/ Science & Engineering Faculty free_to_read Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au Cretaceous Research Ammonite Antarctica Cretaceous Fossil James Ross Island Contribution to Journal 2018 ftqueensland https://doi.org/10.1016/j.cretres.2017.12.006 2024-01-08T23:44:14Z Day Nunatak exposes an actively emergent stratigraphic section located on Snow Hill Island to the east of the Antarctic Peninsula. Strata exposed on Snow Hill Island were deposited in the James Ross Basin, which includes marine units of Cretaceous–Paleogene (K–Pg) age. Here we provide the first report of the sedimentology and paleontology of Day Nunatak, and place it into the broader stratigraphic context of the basin. Day Nunatak was previously unexplored due to difficulties accessing the site, and the historically poor exposure which has recently improved due to warming of the Antarctic Peninsula. Deposits exposed at Day Nunatak are assigned to the Karlsen Cliffs Member (KCM) of the Snow Hill Island Formation, and are better preserved than deposits at the type section of the KCM at Karlsen Cliffs, which has been altered by cross-cutting basaltic dikes. Correlation of lithostratigraphic and biostratigraphic data from Day Nunatak with other outcrops in the basin allows the section to be placed within a previously developed stratigraphic framework, and assigned an early Maastrichtian age. Our observations, and previous descriptions of the KCM, are consistent with a middle- to inner-shelf depositional environment below storm-wave base. Ammonites of the genus Gunnarites are very common, with other ammonite genera and benthic mollusks an order of magnitude less common. Stable carbon and oxygen isotope values obtained from bivalve shells are similar to values previously reported from Seymour Island, and suggest seawater temperatures of ∼7 °C. Measured bedding orientations suggest the presence of a structural offset between Day Nunatak and other sections exposed further north on Snow Hill Island. Day Nunatak preserves a similar depositional environment to deposits reported from the uppermost Maastrichtian on Seymour Island, and is the deeper-water equivalent of contemporaneous proximal sections reported from Vega Island. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica James Ross Island Ross Island Seymour Island Snow Hill Island Vega Island Queensland University of Technology: QUT ePrints Antarctic The Antarctic Antarctic Peninsula Ross Island Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Vega Island ENVELOPE(-57.500,-57.500,-63.833,-63.833) Hill Island ENVELOPE(76.070,76.070,-69.395,-69.395) Snow Hill Island ENVELOPE(-57.183,-57.183,-64.466,-64.466) Karlsen ENVELOPE(-46.000,-46.000,-60.350,-60.350) Day Nunatak ENVELOPE(-57.347,-57.347,-64.499,-64.499) Karlsen Cliffs ENVELOPE(-56.954,-56.954,-64.342,-64.342) Snow Hill ENVELOPE(-57.183,-57.183,-64.466,-64.466) Cretaceous Research 84 407 419 |