The occurrence of &lt;em&gt;Dickinsonia&lt;/em&gt; in non-marine facies

N I Bobkov,A V Kolesnikov,A V Maslov,D V Grazhdankin

doi:10.3989/egeol.43587.551

Abstract

En los Urales centrales, Dickinsonia se encuentra en medios de transición entre sustratos continentales y marinos marginales, generalmente de tipo laguna costera rodeada por llanuras mareales. Otro aspecto llamatico es la ausencia de otros taxones ediacáricos asociados con Dickinsonia, relativamente abundantes en otros medios. De hecho, el Miembro de Sinii Kamen de la Formación de Cherny Kamen ha librado una asociación de macrofósiles ediacáricos, que incluye anclajes de tipo aspidellamorfo y mawsonitomorfo, frondomorfos, palaeopascichnidos y estructuras en anillos concéntricos de origen microbiano, con los que no se asocia Dickinsonia.

Highlights

Dickinsonia is an iconic late Ediacaran taxon representing benthic macroscopic soft-bodied organisms of uncertain phylogenetic affinity
Dickinsonia in the central Urals occurs in a succession transitional from marginal marine to non-marine
The Sinii Kamen Member of the Cherny Kamen Formation yielded an assemblage of Ediacaran macrofossils including aspidellamorph and mawsonitomorph holdfasts, frondomorphs, palaeopascichnids, and concentric ring structures of microbial origin; fossils of Dickinsonia have never been found in this association

Summary

Introduction

Dickinsonia is an iconic late Ediacaran taxon representing benthic macroscopic soft-bodied organisms of uncertain phylogenetic affinity. Even within this sequence Dickinsonia appears to be restricted to the least marine facies interpreted as a coastal lagoon surrounded by tidal flats. The Sinii Kamen Member of the Cherny Kamen Formation yielded an assemblage of Ediacaran macrofossils including aspidellamorph and mawsonitomorph holdfasts, frondomorphs, palaeopascichnids, and concentric ring structures of microbial origin; fossils of Dickinsonia have never been found in this association.

Results

Conclusion