Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica
The Upper Cretaceous (Maastrichtian) Sandwich Bluff Member of the López de Bertodano Formation is well exposed on Vega Island in the James Ross Basin off the northeastern coast of the Antarctic Peninsula. Although this unit is one of the richest sources of end-Cretaceous vertebrate fossils in Antarc...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Online Access: | https://researchonline.jcu.edu.au/33737/1/33737%20Roberts%20et%20al%202014.pdf |
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ftjamescook:oai:researchonline.jcu.edu.au:33737 2024-02-11T09:56:57+01:00 Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica Roberts, Eric M. Lamanna, Matthew C. Clarke, Julia A. Meng, Jin Gorscak, Eric Sertich, Joseph J.W. O'Connor, Patrick M. Claeson, Kerin M. MacPhee, Ross D.E. 2014-05-15 application/pdf https://researchonline.jcu.edu.au/33737/1/33737%20Roberts%20et%20al%202014.pdf unknown Elsevier http://dx.doi.org/10.1016/j.palaeo.2014.03.005 https://researchonline.jcu.edu.au/33737/ https://researchonline.jcu.edu.au/33737/1/33737%20Roberts%20et%20al%202014.pdf Roberts, Eric M., Lamanna, Matthew C., Clarke, Julia A., Meng, Jin, Gorscak, Eric, Sertich, Joseph J.W., O'Connor, Patrick M., Claeson, Kerin M., and MacPhee, Ross D.E. (2014) Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica. Palaeogeography, Palaeoclimatology, Palaeoecology, 402. pp. 55-72. restricted Article PeerReviewed 2014 ftjamescook https://doi.org/10.1016/j.palaeo.2014.03.005 2024-01-22T23:33:26Z The Upper Cretaceous (Maastrichtian) Sandwich Bluff Member of the López de Bertodano Formation is well exposed on Vega Island in the James Ross Basin off the northeastern coast of the Antarctic Peninsula. Although this unit is one of the richest sources of end-Cretaceous vertebrate fossils in Antarctica, it is also one of the least sedimentologically and stratigraphically characterized units in the basin. New facies and stratigraphic analyses of the Sandwich Bluff Member and the underlying Cape Lamb Member of the Snow Hill Island Formation were performed in tandem with intensive prospecting for fossil vertebrates and stratigraphic assessment of historic paleontological localities on Vega Island. This effort has led to a revised stratigraphy for the Sandwich Bluff Member and the precise stratigraphic placement of important terrestrial and marine vertebrate fossil localities. Facies analysis reveals a fining and shallowing upward trend through the section that culminates in a newly recognized sequence boundary near the top of the Sandwich Bluff Member, followed by the deposition of a previously unrecognized, 6 m-thick, matrix-supported pebble–cobble conglomerate of probable alluvial origin. Immediately overlying this unit, well-developed Thalassinoides burrow networks in fine-grained transgressive sandstones and siltstones indicate a rapid return to marine conditions. A similar stratigraphic pattern is well documented at the top of the López de Bertodano Formation and the base of the overlying (Paleocene) Sobral Formation on Seymour Island in the southern part of the basin. Although no fossils were recovered to constrain the age of the upper 10–15 m of the succession on Vega Island that preserves the newly recognized upper sequence boundary, strata below this level can be confidently placed within the Manumiella bertodano interval zone, which extends to a short distance below the K–Pg boundary on Seymour Island. Hence, based on sequence stratigraphic and lithostratigraphic evidence, the uppermost 10–15 m of the ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Snow Hill Island Vega Island James Cook University, Australia: ResearchOnline@JCU Antarctic Antarctic Peninsula Cape Lamb ENVELOPE(-57.621,-57.621,-63.909,-63.909) Hill Island ENVELOPE(76.070,76.070,-69.395,-69.395) Sandwich Bluff ENVELOPE(-57.569,-57.569,-63.832,-63.832) Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Snow Hill ENVELOPE(-57.183,-57.183,-64.466,-64.466) Snow Hill Island ENVELOPE(-57.183,-57.183,-64.466,-64.466) Sobral ENVELOPE(-40.650,-40.650,-81.083,-81.083) The Antarctic Vega Island ENVELOPE(-57.500,-57.500,-63.833,-63.833) Palaeogeography, Palaeoclimatology, Palaeoecology 402 55 72 |
institution |
Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
The Upper Cretaceous (Maastrichtian) Sandwich Bluff Member of the López de Bertodano Formation is well exposed on Vega Island in the James Ross Basin off the northeastern coast of the Antarctic Peninsula. Although this unit is one of the richest sources of end-Cretaceous vertebrate fossils in Antarctica, it is also one of the least sedimentologically and stratigraphically characterized units in the basin. New facies and stratigraphic analyses of the Sandwich Bluff Member and the underlying Cape Lamb Member of the Snow Hill Island Formation were performed in tandem with intensive prospecting for fossil vertebrates and stratigraphic assessment of historic paleontological localities on Vega Island. This effort has led to a revised stratigraphy for the Sandwich Bluff Member and the precise stratigraphic placement of important terrestrial and marine vertebrate fossil localities. Facies analysis reveals a fining and shallowing upward trend through the section that culminates in a newly recognized sequence boundary near the top of the Sandwich Bluff Member, followed by the deposition of a previously unrecognized, 6 m-thick, matrix-supported pebble–cobble conglomerate of probable alluvial origin. Immediately overlying this unit, well-developed Thalassinoides burrow networks in fine-grained transgressive sandstones and siltstones indicate a rapid return to marine conditions. A similar stratigraphic pattern is well documented at the top of the López de Bertodano Formation and the base of the overlying (Paleocene) Sobral Formation on Seymour Island in the southern part of the basin. Although no fossils were recovered to constrain the age of the upper 10–15 m of the succession on Vega Island that preserves the newly recognized upper sequence boundary, strata below this level can be confidently placed within the Manumiella bertodano interval zone, which extends to a short distance below the K–Pg boundary on Seymour Island. Hence, based on sequence stratigraphic and lithostratigraphic evidence, the uppermost 10–15 m of the ... |
format |
Article in Journal/Newspaper |
author |
Roberts, Eric M. Lamanna, Matthew C. Clarke, Julia A. Meng, Jin Gorscak, Eric Sertich, Joseph J.W. O'Connor, Patrick M. Claeson, Kerin M. MacPhee, Ross D.E. |
spellingShingle |
Roberts, Eric M. Lamanna, Matthew C. Clarke, Julia A. Meng, Jin Gorscak, Eric Sertich, Joseph J.W. O'Connor, Patrick M. Claeson, Kerin M. MacPhee, Ross D.E. Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica |
author_facet |
Roberts, Eric M. Lamanna, Matthew C. Clarke, Julia A. Meng, Jin Gorscak, Eric Sertich, Joseph J.W. O'Connor, Patrick M. Claeson, Kerin M. MacPhee, Ross D.E. |
author_sort |
Roberts, Eric M. |
title |
Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica |
title_short |
Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica |
title_full |
Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica |
title_fullStr |
Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica |
title_full_unstemmed |
Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica |
title_sort |
stratigraphy and vertebrate paleoecology of upper cretaceous–?lowest paleogene strata on vega island, antarctica |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://researchonline.jcu.edu.au/33737/1/33737%20Roberts%20et%20al%202014.pdf |
long_lat |
ENVELOPE(-57.621,-57.621,-63.909,-63.909) ENVELOPE(76.070,76.070,-69.395,-69.395) ENVELOPE(-57.569,-57.569,-63.832,-63.832) ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-57.183,-57.183,-64.466,-64.466) ENVELOPE(-57.183,-57.183,-64.466,-64.466) ENVELOPE(-40.650,-40.650,-81.083,-81.083) ENVELOPE(-57.500,-57.500,-63.833,-63.833) |
geographic |
Antarctic Antarctic Peninsula Cape Lamb Hill Island Sandwich Bluff Seymour Seymour Island Snow Hill Snow Hill Island Sobral The Antarctic Vega Island |
geographic_facet |
Antarctic Antarctic Peninsula Cape Lamb Hill Island Sandwich Bluff Seymour Seymour Island Snow Hill Snow Hill Island Sobral The Antarctic Vega Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Snow Hill Island Vega Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Snow Hill Island Vega Island |
op_relation |
http://dx.doi.org/10.1016/j.palaeo.2014.03.005 https://researchonline.jcu.edu.au/33737/ https://researchonline.jcu.edu.au/33737/1/33737%20Roberts%20et%20al%202014.pdf Roberts, Eric M., Lamanna, Matthew C., Clarke, Julia A., Meng, Jin, Gorscak, Eric, Sertich, Joseph J.W., O'Connor, Patrick M., Claeson, Kerin M., and MacPhee, Ross D.E. (2014) Stratigraphy and vertebrate paleoecology of Upper Cretaceous–?lowest Paleogene strata on Vega Island, Antarctica. Palaeogeography, Palaeoclimatology, Palaeoecology, 402. pp. 55-72. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1016/j.palaeo.2014.03.005 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
402 |
container_start_page |
55 |
op_container_end_page |
72 |
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1790607259400667136 |