Where: Queensland, Australia (20.9° S, 148.1° E: paleocoordinates 57.1° S, 148.2° E)

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

• From beds equivalent to the Glendoo Member of the Collinsville Coal Measures. Gebbie Formation assigned to the Echinalosia maxwelli, E. davidi, and E. discinia brachiopod zones of Briggs (1998). These zones are correlated with the APP3.3 palynomorph zone and APP4.1 for the upper E. discinia 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. APP4.1 may extend into the Wordian, but a Roadian age is assigned to the formation.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone

Size class: macrofossils

Preservation: mold/impression

Reposited in the UQ

Primary reference: J. B. Waterhouse and J. S. Jell. 1983. The sequence of Permian rocks and faunas near Exmoor Homestead south of Collinsville, north Bowen Basin. Permian Geology of Queensland 231-267 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 105126: authorized by Matthew Clapham, entered by Matthew Clapham on 16.02.2011

Creative Commons license: CC BY (attribution)