globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.03.005
论文题名:
Stratigraphy and vertebrate paleoecology of upper cretaceous-? Lowest paleogene strata on vega island, antarctica
作者: Roberts E.M.; Lamanna M.C.; Clarke J.A.; Meng J.; Gorscak E.; Sertich J.J.W.; O'Connor P.M.; Claeson K.M.; MacPhee R.D.E.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 402
起始页码: 55
结束页码: 72
语种: 英语
英文关键词: Antarctica ; Cretaceous ; Paleoecology ; Stratigraphy ; Vega Island ; Vertebrates
英文摘要: 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 succession on Vega Island may encompass the Cretaceous-Paleogene boundary together with a few meters of the Paleocene Sobral Formation. © 2014.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69361
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: School of Earth and Environmental Sciences, James Cook University, Townsville, QLD 4811, Australia; Section of Vertebrate Paleontology, Carnegie Museum of Natural History, 4400 Forbes Ave., Pittsburgh, PA 15213, United States; Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, 1 University Station C1100, Austin, TX 78712, United States; Department of Paleontology, American Museum of Natural History, Central Park West at 79th St., New York, NY 10024, United States; Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, United States; Department of Earth Sciences, Denver Museum of Nature and Science, 2001 Colorado Blvd., Denver, CO 80205, United States; Department of Biomedical Sciences, Philadelphia College of Osteopathic Medicine, Philadelphia, PA 19131, United States; Department of Mammalogy, American Museum of Natural History, Central Park West at 79th St., New York, NY 10024, United States

Recommended Citation:
Roberts E.M.,Lamanna M.C.,Clarke J.A.,et al. Stratigraphy and vertebrate paleoecology of upper cretaceous-? Lowest paleogene strata on vega island, antarctica[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,402
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Roberts E.M.]'s Articles
[Lamanna M.C.]'s Articles
[Clarke J.A.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Roberts E.M.]'s Articles
[Lamanna M.C.]'s Articles
[Clarke J.A.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Roberts E.M.]‘s Articles
[Lamanna M.C.]‘s Articles
[Clarke J.A.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.