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A rich Ediacaran assemblage from eastern Avalonia; evidence of early widespread diversity in the deep ocean

Philip R. Wilby, John N. Carney and Michael P. A. Howe
A rich Ediacaran assemblage from eastern Avalonia; evidence of early widespread diversity in the deep ocean
Geology (Boulder) (July 2011) 39 (7): 655-658

Abstract

The Avalon Assemblage (Ediacaran, late Neoproterozoic) provides some of the oldest evidence of diverse macroscopic life and underpins current understanding of the early evolution of epibenthic communities. However, its overall diversity and provincial variability are poorly constrained and are based largely on biotas preserved in Newfoundland, Canada. We report coeval high-diversity biotas from Charnwood Forest, UK, which share at least 60% of their genera in common with ones in Newfoundland. This indicates that substantial taxonomic exchange took place between different regions of Avalonia, probably facilitated by ocean currents, and suggests that a diverse deepwater biota may already have been widespread at the time. Contrasts in the relative abundance of prostrate versus erect taxa likely record differential sensitivity to physical environmental parameters (hydrodynamic regime, substrate) and highlight their significance in controlling community structure.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 39
Serial Issue: 7
Title: A rich Ediacaran assemblage from eastern Avalonia; evidence of early widespread diversity in the deep ocean
Affiliation: British Geological Survey, Nottingham, United Kingdom
Pages: 655-658
Published: 201107
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 27
Accession Number: 2011-064701
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sects.
N52°30'00" - N53°00'00", W01°40'00" - W00°40'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201136
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