Where: New South Wales, Australia (34.9° S, 150.4° E: paleocoordinates 69.9° S, 161.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Wandrawandian Formation, Roadian (272.3 - 268.8 Ma)

• Brachiopods in the formation suggest the upper Echinalosia maxwelli, E. davidi, or E. discinia zone, correlated with the upper part of APP3.3 to APP4.1 palynomorph zone (Briggs, 1998). There are no direct radiometric constraints on APP3.3, although the top of the underlying APP3.2 is around 271.6 Ma (Laurie et al., 2016), placing it near the Kungurian-Roadian boundary or in the lower Roadian. 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. As a result, APP3.3 appears to fall entirely within the Roadian. The top of APP4.1 is likely late Wordian, constrained by earliest Capitanian radiometric dates in the lower part of APP4.2 (Laurie et al., 2016). The Broughton Formation, higher in the Sydney Basin succession, also yields an early Capitanian radiometric date (262.51 Ma) from its uppermost part (Metcalfe et al., 2015). Therefore upper parts of the formation are possibly early Wordian in age. Laseron mentions that Grassy Gully is in the lower part of the formation, so a Roadian age is assigned.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified siliciclastic sediments

Size class: macrofossils

Collection methods: Repository: Australian Museum, Sydney

Primary reference: C. F. Laseron. 1910. Palaeontology of the lower Shoalhaven River. Journal and Proceedings of the Royal Society of New South Wales 44:190-225 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 161845: authorized by Matthew Clapham, entered by Matthew Clapham on 13.09.2014

Creative Commons license: CC BY (attribution)