Where: New South Wales, Australia (32.7° S, 151.5° E: paleocoordinates 67.6° S, 161.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Echinalosia maxwelli brachiopod zone, Elderslie Formation, Roadian (272.3 - 268.8 Ma)

• Brachiopods suggest the Echinalosia maxwelli brachiopod zone, equivalent to the upper part of APP3.2 or lower 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. maxwelli zone is most likely Roadian.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siltstone

Size class: macrofossils

Primary reference: G. McClung. 1978. Morphology, palaeocology and biostratigraphy of Ingelarella (Brachiopoda : Spiriferida) in the Bowen and Sydney Basins of Eastern Australia. Geological Survey of Queensland Publication 365:17-87 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 102915: authorized by Matthew Clapham, entered by Matthew Clapham on 20.01.2011

Creative Commons license: CC BY (attribution)