Micropalaeontology of the Late Proterozoic Arcoona Quartzite Member of the Tent Hill Formation, Stuart Shelf, South Australia

“…1, 2) (Damassa and Knoll, 1986;Zang andWalter, 1989, 1992;Jenkins et al, 1992;Zang, 1995;Grey et al, 2003;Grey, 2005;Willman et al, 2006;Willman and Moczydłowska, 2008). Preservation ranges from excellent to severely degraded, and some of the observed variability among samples is attributable to taphonomic alteration.…”

Section: Introductionmentioning

confidence: 95%

Taphonomy of Ediacaran Acritarchs From Australia: Significance for Taxonomy and Biostratigraphy

Grey¹,

Willman²

2009

PALAIOS

View full text Add to dashboard Cite

A diverse assemblage of Australian Ediacaran (late Neoproterozoic) acritarchs from the Centralian Superbasin and Adelaide Rift Complex demonstrates a range of taphonomic degradation. Recognition of taphonomic variants is critical for taxonomic studies and biostratigraphic interpretation. Taphonomic features observed include compression features, folding and tearing of vesicle walls, pitting, perforation, abrasion, exfoliation, shrinking, twisting, splitting, curling, shredding, pyritization, particle entrapment, and thermal maturation effects. The physical and chemical structure of the vesicle wall is instrumental in determining the degree of taphonomic damage. Consistent associations allow identification of degradation series that incorporate previously described individual species and provide a framework for taxonomic revision. Taphonomic associations may also characterize taphofacies, providing an additional tool for basin analysis.

show abstract

“…Previous attempts to isolate organic-walled microfossils from clastic units of the later Proterozoic succession in the Flinders Ranges have proved largely unsuccessful (Preiss, 19876), although Damassa & Knoll (1986) described a well-preserved microplankton assemblage comprising leiosphaerid acritarchs, cyanobacterial filaments and probable fragments of vendotaenid algae from the Tent Hill Formation on the nearby Stuart Shelf (Fig. 1, locality 6).…”

Section: Stratigraphic Controlmentioning

confidence: 99%

“…Strata associated with the circum-global distribution of the late Proterozoic Ediacara assemblage of large, soft-bodied metazoan remains (Glaessner, 1984;Hofmann, 1987) tend to contain impoverished microbiotas. These typically comprise a few species of small, simple-walled acritarchs (Vidal & Knoll, 1983;Damassa & Knoll, 1986;Germs, Knoll & Vidal, 1986), although the Vendian of the Russian Platform has yielded rather more varied microfossils including large leiosphaerids (e.g. Velikanov, Assejeva & Fedonkin, 1983;Velikanov, 1990).…”

Section: Introductionmentioning

confidence: 99%

The record and stratigraphie implications of organic-walled microfossils from the Ediacaran (terminal Proterozoic) of South Australia

et al. 1992

View full text Add to dashboard Cite

Two assemblages of organic-walled microfossils have been recognized in drillcore samples from the late Proterozoic Rodda Beds in theeastern Officer Basin, South Australia. The fossils include tube-like remains and large, simple and sculptured acritarchs. Lithostratigraphic studies and seismic information, in conjunction with previous (albeit limited) acritarch finds, allow local correlation of the Rodda Beds with Ediacaran or terminal Proterozoic sequences in the northern Adelaide Fold Belt (site of the nominated Ediacaran stratotype). The new palynofloras are comparable withacritarch assemblages in the Amadeus Basin of central Australia, and suggest tentative correlations with sequences in China and the U.S.S.R. The presence of isotopically heavy marine carbonate in the lower fossiliferous horizons of the Rodda Beds (σ13CPDB = +3 to +6%0) is consistent with isotopic data from the equivalent interval in China. In contrast, the upper fossiliferous strata occur higher in the Rodda Beds where carbonate is significantly lighter (σ13CPDB = -1 to + 3%0).

show abstract

Micropalaeontology of the Late Proterozoic Arcoona Quartzite Member of the Tent Hill Formation, Stuart Shelf, South Australia

Cited by 25 publications

References 24 publications

Neoproterozoic microfossils from the Officer Basin, Western Australia

Neoproterozoic microfossils from the Officer Basin, Western Australia

Taphonomy of Ediacaran Acritarchs From Australia: Significance for Taxonomy and Biostratigraphy

The record and stratigraphie implications of organic-walled microfossils from the Ediacaran (terminal Proterozoic) of South Australia

Contact Info

Product

Resources

About