Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica
SUMMARY: The thick sequence of fossiliferous marine and non-marine sandstones and siltstones on Seymour I. represents the most complete well-exposed section of Upper Cre-taceous to Lower Tertiary rocks known in the Southern Hemisphere. The succession has been divided into the Upper Campanian to poss...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.1867 http://jgs.geoscienceworld.org/content/jgs/139/6/779.full.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1030.1867 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1030.1867 2023-05-15T13:57:36+02:00 Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica William J. Zinsmeister The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.1867 http://jgs.geoscienceworld.org/content/jgs/139/6/779.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.1867 http://jgs.geoscienceworld.org/content/jgs/139/6/779.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://jgs.geoscienceworld.org/content/jgs/139/6/779.full.pdf text ftciteseerx 2016-10-30T00:10:51Z SUMMARY: The thick sequence of fossiliferous marine and non-marine sandstones and siltstones on Seymour I. represents the most complete well-exposed section of Upper Cre-taceous to Lower Tertiary rocks known in the Southern Hemisphere. The succession has been divided into the Upper Campanian to possibly lowermost Tertiary Marambio Group comprised of the Lopez de Bertodano and Sobral formations and the Lower Tertiary Cross Valley and La Meseta formations of the Seymour Island Group. The Lopez de Bertodano Formation consists of c. 1067 m of medium-grained to silty concretionary sandstones of Middle Campanian to possibly Maestrichtian age, and the Sobral Formation of c. 210 m of medium- to coarse-grained glauconitic concretionary sandstones. The precise age of the Sobral Formation is uncertain, but may be Maestrichtian to possibly Danian. The lower 110 m of the Seymour Island Group consists of non-marine gravelly to pebbly sandstones and tuffaceous plant-bearing siltstones of the Cross Valley Formation, overlying which are 450 m of fine-grained marine sandstones and siltstones with interbedded fossiliferous pebbly conglomerates. Recent studies of the diverse and abundant faunas and floras of the Seymour Island Group have shown that they are older than previously thought, the Cross Text Antarc* Antarctica Seymour Island Unknown Cross Valley ENVELOPE(-56.683,-56.683,-64.258,-64.258) Lopez ENVELOPE(-63.567,-63.567,-64.850,-64.850) Lopez de Bertodano ENVELOPE(-56.719,-56.719,-64.236,-64.236) Marambio ENVELOPE(-56.750,-56.750,-64.283,-64.283) Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Sobral ENVELOPE(-40.650,-40.650,-81.083,-81.083) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
SUMMARY: The thick sequence of fossiliferous marine and non-marine sandstones and siltstones on Seymour I. represents the most complete well-exposed section of Upper Cre-taceous to Lower Tertiary rocks known in the Southern Hemisphere. The succession has been divided into the Upper Campanian to possibly lowermost Tertiary Marambio Group comprised of the Lopez de Bertodano and Sobral formations and the Lower Tertiary Cross Valley and La Meseta formations of the Seymour Island Group. The Lopez de Bertodano Formation consists of c. 1067 m of medium-grained to silty concretionary sandstones of Middle Campanian to possibly Maestrichtian age, and the Sobral Formation of c. 210 m of medium- to coarse-grained glauconitic concretionary sandstones. The precise age of the Sobral Formation is uncertain, but may be Maestrichtian to possibly Danian. The lower 110 m of the Seymour Island Group consists of non-marine gravelly to pebbly sandstones and tuffaceous plant-bearing siltstones of the Cross Valley Formation, overlying which are 450 m of fine-grained marine sandstones and siltstones with interbedded fossiliferous pebbly conglomerates. Recent studies of the diverse and abundant faunas and floras of the Seymour Island Group have shown that they are older than previously thought, the Cross |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
William J. Zinsmeister |
spellingShingle |
William J. Zinsmeister Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica |
author_facet |
William J. Zinsmeister |
author_sort |
William J. Zinsmeister |
title |
Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica |
title_short |
Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica |
title_full |
Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica |
title_fullStr |
Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica |
title_full_unstemmed |
Review of the Upper Cretaceous-Lower Tertiary sequence on Seymour Island, Antarctica |
title_sort |
review of the upper cretaceous-lower tertiary sequence on seymour island, antarctica |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.1867 http://jgs.geoscienceworld.org/content/jgs/139/6/779.full.pdf |
long_lat |
ENVELOPE(-56.683,-56.683,-64.258,-64.258) ENVELOPE(-63.567,-63.567,-64.850,-64.850) ENVELOPE(-56.719,-56.719,-64.236,-64.236) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-40.650,-40.650,-81.083,-81.083) |
geographic |
Cross Valley Lopez Lopez de Bertodano Marambio Seymour Seymour Island Sobral |
geographic_facet |
Cross Valley Lopez Lopez de Bertodano Marambio Seymour Seymour Island Sobral |
genre |
Antarc* Antarctica Seymour Island |
genre_facet |
Antarc* Antarctica Seymour Island |
op_source |
http://jgs.geoscienceworld.org/content/jgs/139/6/779.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.1867 http://jgs.geoscienceworld.org/content/jgs/139/6/779.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766265318001344512 |