Upper beds, eastern end of the Chase Range (Ediacaran of Australia)

Also known as Rawnsley Quartzite Fm. , Ediacara Mb.,- Gehling 1987

Where: South Australia, Australia (31.7° S, 138.8° E: paleocoordinates 15.0° N, 164.4° W)

• outcrop-level geographic resolution

When: White Sea other zone, Ediacara Member (Rawnsley Quartzite Formation), Ediacaran (635.0 - 541.0 Ma)

• Fossils are confined to a maximum stratigraphic range of 110m within the Ediacara Member (152 m thick and starting 67m above the base of the Rawnsley Quartzite). The fossiliferous beds are confined to two or three intervals each less than 10m thick and occur as impressions on the bases of the bedded sandstone beds.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, graded sandstone and lithified claystone

• medium bedded sandstones wich are individually massive at the base, grading up into wispy cross laminations with starved interference ripples at the top, and interbedded with claystone.

Size class: macrofossils

Preservation: mold/impression, adpression

Collection methods: bulk,

Primary reference: J. G. Gehling. 1987. Earliest known echinoderm - a new Ediacaran fossil from the Pound Subgroup of South Australia. Alcheringa 11:337-345 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 10280: authorized by Mark Patzkowsky, entered by Phil Borkow on 30.03.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

 Bilateria -
Dickinsonia costata Sprigg 1947
 Triradialomorpha -
Tribrachidium heraldicum Glaessner 1959
 Pentaradialomorpha -
Arkarua adami n. gen. n. sp.
Arkarua adami n. gen. n. sp. Gehling 1987
30 specimens from base of beds, 27 specimens as float
 Eumetazoa -
Parvancorina minchami Glaessner 1958
Brachina delicata Wade 1972
Rugoconites enigmaticus
  -
Rugoconites enigmaticus Glaessner and Wade 1966
unclassified
  -
Problematica indet. Andrews 1970
multiple unidentified fauna
Aspidella
  -
"Cyclomedusa sp." = Aspidella
"Cyclomedusa sp." = Aspidella Billings 1872