%0 Journal Article
%T Ordovician-Silurian boundary graptolites of the Southern Alps, Austria
%A £¿torch P
%A Sch£¿nlaub H -P
%J Bulletin of Geosciences
%D 2012
%I Czech Geological Survey
%R 10.3140/bull.geosci.1350
%X Seven species of graptoloid graptolites are described from Hirnantian and lower Rhuddanian formations of the Austrian part of the Carnic and western Karavanke Alps. The Pl cken Formation, of latest Ordovician (Hirnantian) age, yields the biozonal index graptolite Metabolograptus persculptus in the Cellon Reference Section and, tentatively, the Feistritzgraben Section. A distinctive graptolite assemblage indicating an earliest Silurian (early Rhuddanian) age comes from the Waterfall Section near Zollnersee H¨¹tte. Along with the presence of the biozonal index Parakidograptus acuminatus and accompanying taxa, common Rickardsograptus? bifurcus (Ye) has been recorded - for the first time outside China. The absence of Neodiplograptus lanceolatus  torch & Serpagli, Normalograptus trifilis (Manck) and other easily recognizable lowermost Rhuddanian species which are dominant in this level throughout peri-Gondwanan Europe indicates the peculiar character of the acuminatus Biozone assemblage encountered in the Carnic Alps.
%K : graptolite
%K biostratigraphy
%K palaeobiogeography
%K Hirnantian
%K Rhuddanian
%K Southern Alps
%K Austria
%U http://www.geology.cz/bulletin/fulltext/1350_Storch.pdf