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Species of the acritarch genus Palaeostomocystis; potential indicators of neritic subpolar to polar environments in Antarctica during the Cenozoic

Sophie Warny
Species of the acritarch genus Palaeostomocystis; potential indicators of neritic subpolar to polar environments in Antarctica during the Cenozoic (in Special issue honoring the memory of professor John H. Wrenn, Martin J. Head (editor) and Francine M. G. McCarthy (editor))
Palynology (February 2009) 33 (2): 43-54

Abstract

A palynological analysis was undertaken on 16 samples from seven piston cores collected along two offshore transects near Seymour and James Ross Islands. Diverse assemblages of reworked marine microplankton (including organic-walled dinoflagellate cysts, cymatiosphaerids, leiospheres, and other acritarchs) and terrestrial palynomorphs (including pollen and spores) were recovered from glacio-marine sediments of late Pleistocene age. Among the reworked taxa, four species belonging to the acritarch genus Palaeostomocystis Deflandre 1937 comprise up to 17% of all palynomorphs. Highest abundances were recorded from sites close to the coast. The potential use of Palaeostomocystis as a proxy for early ice-sheet development on the Antarctic margins is evaluated in light of earlier studies. This evaluation suggests that the high abundances of Palaeostomocystis on the Antarctic Peninsula reflect neritic-type environments (shallow waters, bay-like areas, or marginal seas) and sub-polar to polar conditions as exist in the Bering Sea, Greenland margins, and other sub-arctic to arctic areas today.


ISSN: 0191-6122
EISSN: 1558-9188
Serial Title: Palynology
Serial Volume: 33
Serial Issue: 2
Title: Species of the acritarch genus Palaeostomocystis; potential indicators of neritic subpolar to polar environments in Antarctica during the Cenozoic
Title: Special issue honoring the memory of professor John H. Wrenn
Author(s): Warny, Sophie
Author(s): Head, Martin J.editor
Author(s): McCarthy, Francine M. G.editor
Affiliation: Louisiana State University, Department of Geology and Geophysics, Baton Rouge, LA, United States
Affiliation: Brock University, Department of Earth Sciences, Saint Catharines, ON, Canada
Pages: 43-54
Published: 200902
Text Language: English
Publisher: American Association of Stratigraphic Palynologists, Dallas, TX, United States
References: 31
Accession Number: 2010-045914
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., 1 plate, 1 table, geol. sketch map
S64°15'00" - S63°49'60", W57°42'00" - W53°17'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, American Association of Stratigraphic Palynologists. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201025
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