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Is aberrancy a reliable indicator for major paleoclimatic disturbance?

Stephen Stukins
Is aberrancy a reliable indicator for major paleoclimatic disturbance?
Palaios (May 2022) 37 (5): 145-149


Aberrant forms of many different spore and pollen taxa (sporomorphs) are often used to assess timings and extent of environmental stress at major extinction/climate events. However, little is known about the normal level of malformations in these taxa. Malformation can manifest in several different ways, including significant size differences (+ or - from the accepted range for the species), retention of pollen/spores within tetrads, and unusual and inconsistent morphological aberrations. This study analyses one commonly used pollen genus, Classopollis, and its aberrant forms, from the Bajocian of Argentina. Tetrads, including those incorporating malformed/aborted pollen grains, are found to be common, showing that tetrads of Classopollis are not a reliable signal of major environmental disturbance. The results and discussion presented here emphasize why palynological data must be interpreted in context of the depositional dynamics, facies changes and how they affect the assemblages in conjunction with understanding variations in the strategies of individual flora.

ISSN: 0883-1351
EISSN: 1938-5323
Serial Title: Palaios
Serial Volume: 37
Serial Issue: 5
Title: Is aberrancy a reliable indicator for major paleoclimatic disturbance?
Author(s): Stukins, Stephen
Affiliation: Natural History Museum, Department of Earth Sciences, London, United Kingdom
Pages: 145-149
Published: 202205
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 31
Accession Number: 2022-033479
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch map
S39°15'00" - S39°15'00", W70°15'00" - W70°15'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 202212
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