Wyro Beach, Ulladulla (Permian of Australia)

Where: New South Wales, Australia (35.4° S, 150.4° E: paleocoordinates 70.4° S, 162.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• Brachiopods suggest the Echinalosia 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, but a Roadian age is assigned in the Ulladulla area.

• group of beds-level stratigraphic resolution

Environment/lithology: prodelta; lithified mudstone

• Fine-grained sediments indicate environment below wave base, and presence of slumps at Warden Head suggests prodelta rather than offshore.

Size class: macrofossils

Preservation: mold/impression

Primary reference: J. Armstrong. 1970. Syringothyrid brachiopods from the Permian of eastern Australia. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 136(2):135-165 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 101578: authorized by Matthew Clapham, entered by Matthew Clapham on 24.12.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Rostroconchia
 Conocardiida - Bransoniidae
"Conocardium robustum" = Bransonia robustum2, "Conocardium australe" = Bransonia australe2
"Conocardium robustum" = Bransonia robustum2 Fletcher 1943
"Conocardium australe" = Bransonia australe2 M'Coy 1847
Rhynchonellata
 Spiriferinida - Syringothyrididae
"Subansiria ulladullensis n. sp." = Cyrtella ulladullensis
"Subansiria ulladullensis n. sp." = Cyrtella ulladullensis Armstrong 1970
 Spiriferida - Ingelarellidae
Glendonia ulladullensis3 McClung and Armstrong 1978
 Terebratulida - Gillediidae
Gilledia culburrensis1, "Gilledia ulladullensis n. sp." = Paragilledia ulladullensis1
Gilledia culburrensis1 Campbell 1965
"Gilledia ulladullensis n. sp." = Paragilledia ulladullensis1 Campbell 1965
 Terebratulida - Dielasmatidae
Fletcherithyris illawarrensis n. sp.1 Campbell 1965
Fletcherithyris parkesi n. sp.1 Campbell 1965