Journal
GEOLOGICAL MAGAZINE
Volume 146, Issue 5, Pages 775-780Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0016756809990185
Keywords
Ediacaran Period; Siberian Platform; Gaojiashania; non-metazoan trace fossils
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Funding
- Departamento de Ciencia, Tccnologia y Universidad (Gobierno de Aragon)
- CB 3/08 Programa Europa XXI de Estancias de Investigacion (CAI-CONAI+D) 2008
- [M1042/2006]
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We describe the first occurrence of the problematic fossil Gaojiashania outside China, in the Ediacaran Yudoma Group of the Siberian Platform. In both areas, Gaojiashania characterizes the lower upper Ediacaran strata and precedes the appearance of Cloudina and other skeletal fossils, which highlights its significance for the Ediacaran Subdivision and correlation. Features of this fossil such as indeterminate length, the absence of a distinct growth pattern, and self-avoiding behaviour indicate its trace fossil origin but do not necessarily imply metazoan affinities for its producers. Several organisms including stern-group social amoebozoans and unicellular protists may have been Proterozoic trace fossil producers.
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