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Systematics, Biostratigraphy And Evolution Of The Late Ludlow And Pridoli (Late Silurian) Graptolites Of The Yass District, New South Wales, Australia, R B. Rickards, Anthony J. Wright

Faculty of Science, Medicine and Health - Papers: part A

Graptolites from the Yass district of New South Wales include important material from: low in the Black Bog Shale; from the Yarwood Siltstone Member; 2 levels high in the Black Bog Shale; 2 levels low in the Rosebank Shale; low in the Cowridge Siltstone; and in the lower part of the Elmside Formation. The faunas from the lower 4 levels are late Ludlow (early Late Silurian), and the higher 4 levels are Prídolí (late Late Silurian). Twenty-seven graptolite taxa, a considerable increase on previous records from Yass, have been identified in the late Ludlow and Prídolí of the district. These …