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ACTA UNIVERSITATIS LATVIENSIS, 2004, Vol. 679, pp. 148-157 Evidence of biostratigraphic correlations within the Wood Bay Formation (Lower Devonian, Spitsbergen) Some paleontological results of the 1969 french expedition with geological considerations VINCENT NOËL PERNEGRE and VINCENT G. DUPRET Vincent Noël Pernegre and Vincent G. Dupret,, USM 0203, Département Histoire de la Terre, Laboratoire de Paléontologie, 8, rue Buffon, 75005 Paris, France; pernegre@hotmail.com, dupret@mnhn.fr Until now, geologists and paleontologists who study the Wood Bay Formation (Lower Devonian, Spitsbergen) have been using different stratigraphic tables. The geological works are based on a lithostratigraphic scale defined in the Dicksonfjord–Austfjord area while paleontological works are based on a biostratigraphic scale established in the Woodfjord area. A large amount of palaeontological material was collected in both cited regions during the 1969 French mission (CNRS-MNHN). This material is here used to establish the first correlation between the palaeontological divisions and the geological ones. Finally equivalencies are proposed as follows: the Sigurdfjellet and Kapp Kjeldsen faunal divisions are lateral equivalents of the Austfjord Member, while the Keltiefjellet and Stjørdalen divisions are equivalent to the Dicksonfjord Member at the Dicksonfjord-Austfjord area. Introduction The Wood Bay Formation (Lower Devonian, Spitsbergen) is commonly divided, for palaeontologists, into four faunal divisions: Sigurdfjellet, Kapp Kjeldsen, Keltiefjellet and Stjørdalen (Føyn and Heintz 1943; Friend et al. 1966; Goujet 1984; Fig. 1). These divisions are characterised by vertebrate associations, mainly pteraspidiform heterostracans (Friend et al. 1966). Recent works have increased our knowledge of the Wood Bay Formation biodiversity (Blieck et al. 1987; Pernegre 2002, 2003, 2004; and a still unpublished revision of the genus Gigantaspis). An extensive study of material collected during the 1969 French expedition (CNRS-MNHN), makes it possible to establish biostratigraphic interpretations and correlations between the field localities. We establish here that two localities (from Mount Sigurd) bracket the Sigurdfjellet – Kapp Kjeldsen boundary. Some others (from Mount Wagner) characterise the boundary between the Kapp Kjeldsen - Keltiefjellet faunal divisions. From these preceding data, a new scheme of correlation is proposed between the Woodfjord area, divided into biostratigraphic units (Blieck and Cloutier 2000), and the Dicksonfjord-Austfjord area, divided into stratigraphic units (Blieck and Cloutier 2000).
V. Pernegre, V. Dupret. Biostratigraphic correlations within Wood Bay Formation 149 Fig.1. Geological map of the north Devonian graben. Detail of the Wood Bay Formation stratigraphy. Scale: 20 km. After Friend and Moody-Stuart 1972; Murashov and Mokin 1976; Goujet 1984. Locality map of the studied field sites. 1: A 16 ; 2: BL; 3: BO; 4: A 11 ; 5: BH; 6: BJ; 7: Bi; 8-11: A 1-4 ; 12: B’I; 13: BI; 14: BII; 15: BIV; 16: BC; 17: BG; 18: BE; 19: BD; 20-22: H ; 23: C ; 24-26: BR ; 27: BS; 28: B∆; 29: B∆’; 30: C ; 31: C ; 32: BT; 33: C 1- ; 34: BY. 3 4 1-3 18 17 19
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LATVIJAS UNIVERSITĀTES RAKSTI 679.
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LATVIJAS UNIVERSITĀTES RAKSTI 679.
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Contents Ervīns Lukševičs and Ģ
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ACTA UNIVERSITATIS LATVIENSIS, 2004
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Ervīns Lukševičs, Ģirts Stinkul
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Olga Afanassieva. Microrelief on th
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D.K. Elliott, E. Mark-Kurik, E.B. D
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H.-P. Schultze, T. Marss. Revisitin
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O.A. Lebedev. A new tetrapod from R
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Page 159 and 160: Ž. Žigaite. New telodont from Tuv
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