Where: Tasmania, Australia (42.8° S, 147.2° E: paleocoordinates 78.2° S, 165.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: A Member (Malbina Formation), Roadian (272.3 - 268.8 Ma)

• Lower 50-60 feet of unit.

•Brachiopods indicate the Echinalosia 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 sandstone and lithified siltstone

Size class: macrofossils

Preservation: mold/impression

Primary reference: M. J. Clarke. 1971. The fauna and age of Malbina A. Technical Reports - Tasmania Department of Mines 14:151-157 [M. Clapham/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 105423: authorized by Matthew Clapham, entered by Matthew Clapham on 20.02.2011

Creative Commons license: CC BY (attribution)