Running across the Silurian/Devonian Boundary Along Northern Gondwana: A Conodont Perspective

0551874 - GLÚ 2022 RIV CH eng J - Journal Article
Ferretti, A. - Corriga, M. G. - Slavík, Ladislav - Corradini, C.
Running across the Silurian/Devonian Boundary Along Northern Gondwana: A Conodont Perspective.
Geosciences. Roč. 12, č. 1 (2022), č. článku 43. ISSN 2076-3263
R&D Projects: GA ČR(CZ) GA21-21829S
Institutional support: RVO:67985831
Keywords : chronostratigraphy * biostratigraphy * correlation * Palaeozoic * Silurian/Devonian GSSP
OECD category: Paleontology
Impact factor: 2.7, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2076-3263/12/1/43

The Global Stratotype Section and Point (GSSP) of the Silurian/Devonian boundary, Lower Devonian Series and Lochkovian Stage was formally placed in 1977 at Klonk, in the Czech Republic, at the first appearance of the graptolite Uncinatograptus uniformis uniformis (Přibyl). However, since then, correlation of this limit has been often hampered in carbonate facies where graptolites are uncommon or totally absent. A large calcareous deposition occurred at the Silurian/Devonian boundary along the northern and peri-Gondwana margin, thus representing an ideal location to select and test a possible additional biostratigraphic marker of the limit among conodonts. The first appearance of Caudicriodus hesperius almost simultaneously at the base of the Devonian in Bohemia, the Carnic Alps, Sardinia, Morocco and elsewhere indicates that this taxon is the conodont that best approximates the beginning of the Period. The first or last appearance of other species (e.g., Ozarkodina confluens, Zieglerodina klonkensis, Z. remscheidensis and Caudicriodus woschmidti) may help to recognise the boundary as well.
Permanent Link: http://hdl.handle.net/11104/0327082