Conodont assemblages from the Cobar Supergroup (Early Devonian), New South Wales

Late Silurian (Ludlow) and Early Devonian (Pragian) conodonts from the Cobar Supergroup, western New South Wales, Australia

“…It is only tentatively placed in synonymy here because it has a more pronounced postero-basal extension than our specimens. The element illustrated by Pickett (1980, fig. 15Q) is tentatively included in the synonymy for the same reasons.…”

“…The White Tank Limestone Member was described by Felton (1981) as consisting of massively bedded, autochthonous coralline and stomatoporoidal limestones interpreted as a forereef facies grading laterally into well-bedded calcarenites and calcirudites of the Rookery Limestone Member -interpreted as backreef facies. Because the conodonts of these two units have been documented (Pickett 1980), our consideration of them has been limited to a cursory examination of the outcrops, reappraisal of the taxonomy of the forms illustrated by Pickett (1980) and reconsideration of their age-significance.…”

“…6), approximately 35 km SE of Cobar (Pickett 1980), have been grouped into two lithologically dissimilar members assumed to be conformably enclosed within siltstones of the Meryula Formation (Felton 1981). The White Tank Limestone Member was described by Felton (1981) as consisting of massively bedded, autochthonous coralline and stomatoporoidal limestones interpreted as a forereef facies grading laterally into well-bedded calcarenites and calcirudites of the Rookery Limestone Member -interpreted as backreef facies.…”

“…The age of the Rookery Limestone Member has been based on Pickett's (1980) argument that a species of Pedavis from a sample bore core (MAL1, 215 m) put down on "The Rookery" station is Ped. pesavis (Bischoff & Sanneman).…”

“…2) about 500 km NW of Sydney. A further occurrence of limestones, on a property known as "The Rookery", about 35 km SE of Cobar, was cursorily examined; it has already been the focus of a significant conodont investigation by Pickett (1980). Another limestone occurrence -on Kopyje station, 70 km ESE of Cobar -produced 43 rather nondescript conodonts from a 12 kg sample, suggesting a late Přídolí age (Pickett 1976), but access to this property for further investigation as part of this study was refused.…”