La Valute Nord (VALN) section, sample 9 (Silurian of Italy)

Where: Italy (46.6° N, 12.1° E: paleocoordinates 54.3° S, 60.3° E)

• coordinate stated in text

When: “Ozarkodina” eosteinhornensis s.l. conodont zone, Nölbling Formation, Pridoli (423.0 - 419.2 Ma)

Environment/lithology: lithified limestone

• About 60 metres of pelites and limestones crop out in a narrow creek. Just below the measured section a few metres of poorly exposed sandstones and shales belonging to the Valbertad Fm. yield brachiopods, bryozoans and rare echinoderms. The section consists of about 45 m of black shales with interbedded levels and lenses of limestone, belonging to the Nölbling Fm. Limestones are relatively abundant in the lowermost part of the section; Then, after about 7 m of poorly exposed pelites, a few metres of shales and limestones intercalations occur. The pelitic content increase in the central part of the section, where black shales are the only lithology present for more than 20 m. A few tectonic disruptions occur in that part of the section, result in offset and/or shortening, although is impossible to evaluate in the field due to poor outcrop conditions. However, biostratigraphic data (see below) indicate the presence of at least three repetitions. Limestones re-occur at 35 m and became more abundant in the upper part of the section (40-43 m from the base). Above, after an interval of about 10 m that is not exposed, 3.2 m of light gray wackestones-packstones of the Alticola Fm. are present.

Size class: microfossils

Primary reference: C. Corradini, M. Pondrelli, L. Simonetto, M. G. Corriga, C. Spalletta, T. J. Suttner, E. Kido, A. Mossoni, and P. Serventi. 2016. Stratigraphy of the La Valute area (Mt. Zermula massif, Carnic Alps, Italy). Bollettino della Società Paleontologica Italiana 55(1):55-78 [E. Jarochowska/S. Haegele]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 187989: authorized by Emilia Jarochowska, entered by Sarah Haegele on 20.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Conodonta
 Ozarkodinida -
"Ozarkodina" eosteinhornensis conodont
"Ozarkodina" eosteinhorensis s.l.
  - Strachanognathidae
Pseudooneotodus bicornis Drygant 1974 conodont
Subspecies"Pseudooneotodus bicornis bicornis"
Pseudooneotodus beckmanni Bischoff and Sannemann 1958 conodont