UNE L1210, Bickham, Murrurundi (Permian of Australia)

Where: New South Wales, Australia (31.8° S, 150.9° E: paleocoordinates 66.9° S, 159.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Microbaculispora villosa other zone, Bickham Formation, Roadian (272.3 - 268.8 Ma)

• Brachiopods from other collections in the formation suggest the upper Echinalosia maxwelli to E. davidi zone, correlated with the APP3.3 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.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Preservation: mold/impression

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 136623: authorized by Matthew Clapham, entered by Matthew Clapham on 30.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Spiriferida - Ingelarellidae
"Ingelarella isbelli" = Johndearia isbelli
"Ingelarella isbelli" = Johndearia isbelli Campbell 1961