Where: New South Wales, Australia (32.7° S, 151.4° E: paleocoordinates 67.6° S, 161.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Fenestella Shale Member (Branxton Formation), Roadian (272.3 - 268.8 Ma)

• Brachiopods from the formation suggest the Echinalosia davidi brachiopod zone, equivalent to the middle part of APP3.3 palynomorph zone. Laurie et al. (2016) dated zircons from the Rowan Formation in the Sydney Basin (in the underlying upper Echinalosia preovalis zone, or upper APP3.2) as 271.60 and 271.89 Ma, constraining its upper part to Roadian, given a Roadian-Wordian boundary around 266.9 Ma (Wu et al., 2020). Strata in Western Australia assigned to APP4.1 yielded U-Pb ages of 269.25 Ma or younger, constraining the upper boundary of APP3.3 to the late Roadian (Laurie et al. 2016). As a result, APP3.3 appears to fall entirely within the Roadian. As a result, the E. davidi zone is most likely Roadian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, micaceous, brown sandstone

Size class: macrofossils

Preservation: mold/impression

Reposited in the UQ

Primary reference: J. B. Waterhouse. 1979. New members of the Atomodesminae (Bivalvia) from the Permian of Australia and New Zealand. Papers - Department of Geology, University of Queensland 9:1-22 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 134521: authorized by Matthew Clapham, entered by Matthew Clapham on 10.10.2012

Creative Commons license: CC BY (attribution)