SCIENTIFIC PORTAL FOR ALL USERS INTERESTED IN PTEROBRANCHS AND GRAPTOLITES
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Early Silurian graptolites from Tasmania and their significance
P.W. Baillie, M.R. Banks and R.B. Rickards
Search (1978), 9, 1-2, 46-47
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The presence of Atavograptus sp., Glyptograptus persculptus (Salter), Climacograptus normalis Lapworth and
Akidograptus sp. on one horizon in the Westfield Beds, southwestern Tasmania, suggests an Early Llandovery, persculptus
zone or low acuminatus zone correlation for that horizon. Horizons lower in the Westfield Beds contain trinucleid trilobites
and are presumably Late Ordovician. Thus is the Ordovician Silurian boundary is likely to lie within a conformable
succession containing mainly shelly fossils but also some graptolites.
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