Also known as Bent's Farm

Where: Queensland, Australia (22.6° S, 149.7° E: paleocoordinates 58.4° S, 151.5° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• 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.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Collection methods: Repository: Geological Survey of Queensland (material described by Etheridge, 1894)

Primary reference: B. Runnegar. 1967. Desmodont bivalves from the Permian of eastern Australia. Bureau of Mineral Resources, Geology and Geophysics Bulletin 96:1-108 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 136668: authorized by Matthew Clapham, entered by Matthew Clapham on 01.12.2012

Creative Commons license: CC BY (attribution)