Late Ordovician (Eastonian) conodonts from the Early Devonian Drik Drik Formation, Woolomin area, eastern Australia

WA Museum Records and Supplements | Updated 9 years ago

Abstract - The Early Devonian (Emsian) Drik Drik Formation of the Tamworth Group, that crops out between Tamworth and Nundle in northeast New South Wales, comprises mainly coarse sedimentary rocks that host limestone masses of a range of ages. Several blocks from one locality are richly fossiliferous and yielded a fauna of 1024 Late Ordovician conodonts. The fauna includes Belodina confluens, Phragmodus undatus, Yaoxianognathus sp. cf. Y. ani, Y. trunguskaensis and Drepanoistodus suberectus, indicating an Eastonian age. Similar faunas are known from the olistostromal Wisemans Arm Formation and are characteristic of the Late Ordovician "Australasian Faunal Province".