Where: Victoria, Australia (38.3° S, 144.3° E: paleocoordinates 52.9° S, 142.2° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Jan Juc Formation, Chattian (28.1 - 23.0 Ma)
• STRATIGRAPHIC RELATIONS: McCoy described the locality as from the "Miocene junction beds" or the "passage beds of the Tertiary sands" or just "sandy beds." Both the Jan Juc and overlying Puebla Formations are exposed at Bird Rock, but the Jan Juc Formation is coarser-grained. The associated fauna is also more characteristic of the Jan Juc Formation. AGE: Late Oligocene according to molluscan biostratigraphy of Darragh and Kendrick (2000) and Beu and Darragh (2001). Kelly et al. (2001) reported an age of 23.9 Ma for the basal Puebla Clay from Bird Rock, based on measured 87Sr/86Sr ratios from planktonic foraminifera, recalculated to 23.89-21.39 Ma by McLaren et al., 2009. McLaren calculated an age of 27.2-24.8 Ma for brachiopod shells (87Sr/86Sr) located about 7.5 m below the top of the Jan Juc Formation. Siesser (1979) found a possibly mid-Rupelian to earliest Aquitanian range for the Jan Juc Formation (NP24-NN1) and an early Miocene (NN2-NN4) age for the overlying Puebla Formation. Planktonic foraminifera in Li et al. (1999), including Globoquadrina dehiscens, suggest an early Aquitanian (M1b or mid N4) age for the basal Puebla Formation. Together, these lines of evidence support a latest Chattian age for the collection, although it could be basal Aquitanian. STRATIGRAPHIC POSITION: The description as "junction beds" or "passage beds" suggests that the collection is from the upper part of the formation, close to the distinct lithological contact with the Puebla Formation.
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal shelf; poorly lithified, bioturbated, glauconitic, shelly/skeletal, argillaceous wackestone
Size class: macrofossils
Preservation: original aragonite
Collected by R. Daintree in 1861
• Collections are registered in the Western Australia Museum (WAM) and Museum of Victoria (NMV).
Primary reference: F. McCoy. 1874. Decade I. Prodromus of the Palaeontology of Victoria 1-43 [L. Villier/L. Villier/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 176279: authorized by Pete Wagner, entered by Pete Wagner on 05.02.2016, edited by Matthew Clapham
Creative Commons license: CC BY (attribution)
Taxonomic list
Anthozoa | |
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Echinoidea | |
"Pericosmus compressus" = Pericosmus crawfordi5
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Gastropoda | |
Voluta macroptera McCoy 1874 volute
Voluta anticingulata McCoy 1874 volute | |
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Bivalvia | |
"Trigonia semiundulata" = Eotrigonia semiundulata2
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"Cardium pseudomagnum" = Hedecardium (Hedecardium) pseudomagnum4
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"Limopsis aurita" = Limopsis (Limopsis) aurita2
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Cephalopoda | |
"Aturia australis" = Aturia cubaensis3
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