Where: New South Wales, Australia (35.2° S, 150.4° E: paleocoordinates 70.3° S, 162.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Echinalosia maxwelli brachiopod zone, Snapper Point 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: shoreface; lithified sandstone

Size class: macrofossils

Primary reference: D. J. C. Briggs. 1998. Permian Productidina and Strophalosiidina from the Sydney-Bowen Basin and New England Orogen: systematics and biostratigraphic significance. Memoirs of the Association of Australasian Palaeontologists 19:1-258 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 102916: authorized by Matthew Clapham, entered by Matthew Clapham on 20.01.2011

Creative Commons license: CC BY (attribution)