Research paper
Upper Frasnian and Lower Famennian (Upper Devonian) conodonts of the Compte section (Spanish Central Pyrenees)
GONÇALO G. SILVÉRIO
Instituto de Ciências da Terra, Pólo de Évora, Rua Romão Ramalho, 59, 7002-554 Évora, Portugal. gsilverio@uevora.pt
Corresponding author
JOSÉ I. VALENZUELA-RÍOS
Department of Botany and Geology, Universidad de Valencia, C/Dr. Moliner 50, E-46100 Burjassot, Spain. jose.i.valenzuela@uv.es
JAU-CHYN LIAO
Department of Botany and Geology, Universidad de Valencia, C/Dr. Moliner 50, E-46100 Burjassot, Spain. jau.liao@uv.es
ABSTRACT
Through the study of conodonts, strata around the Frasnian–Famennian boundary in the Compte section were analyzed in detail. Twenty-four samples in a 12 m thick sequence yielded 13 species of conodonts belonging to Ancyrodella, Ancyrognathus, Icriodus, Palmatolepis, and Polygnathus. Besides conodonts, other groups such as foraminifers, radiolarians, brachiopods, ostracods and crinoids were also found in the sequence. The conodont record, shows the FZ13, from the uppermost Frasnian, and the minuta and crepida zones from the lower Famennian. The last Frasnian fossil was obtained from Bed 92b and the first Famennian fossil was from Bed 92d, which are separated by about 45 cm. Thus, between these two samples, the lowest three Famennian conodont zones have to be represented or missing. The absence of any stratigraphic hiatus between these levels suggests that extreme condensation took place in the early Famennian in the CP section.
Key words: Frasnian, Famennian, conodonts, biostratigraphy, Pyrenees.
How to cite: Silvério, G.G., Valenzuela-Ríos, J.I. & Liao, J.-C. 2021. Upper Frasnian and Lower Famennian (Upper Devonian) conodonts of the Compte section (Spanish Central Pyrenees). Spanish Journal of Palaeontology, 36 (2), 205-220.
Received 10 August 2021, Accepted 16 November 2021, Published online: 3 December 2021
https://doi.org/10.7203/sjp.36.2.21950
