Palaeoenvironmental changes at Col des Tribes (Montagne Noire, France), a reference section for the Famennian of north Gondwana-related areas

• DOI: 10.1017/s0016756813000927
• Publication Date: 2013-11-25T14:42:28Z
• Authors: CATHERINE GIRARD; JEAN-JACQUES CORNÉE; CARLO CORRADINI; AURÉLIEN FRAVALO; RAIMUND FEIST
• Keywords: Conodont; Late Devonian extinction; Devonian

Abstract We present detailed biostratigraphy based on conodonts and palaeoenvironmental trends deduced from microfacies conodont abundance through the Famennian (Late Devonian) at Col des Tribes (Montagne Noire, France). The succession is characterized by micritic limestones deposited in settings oscillating between mid to outer ramp. Facies contain poor fauna, widely dominated nektonic organisms. This section complete one of most conodont-rich for north Gondwana-related area. Upper Kellwasser event (Frasnian–Famennian boundary) Hangenberg (Devonian–Carboniferous have been lithologically identified. They are decimetre-thick black dysoxic anoxic argillaceous sediments. Condroz annulata events, although not materialized lithological changes, positioned due precise stratigraphy. first occurred during deposition condensed ferruginous facies (griotte limestones) second micrites barren benthic fauna. combination information both biofacies changes allows a general sea-level curve entire Gondwana be proposed time. At Tribes, trend slight deepening upwards triangularis trachytera zones, then pronounced shallowing-upwards upper praesulcata zones. correlates with well-known reference Euramerica concerning late ( Zones). There some discrepancies minor cycles which can explained tectonical phenomena onset edification Variscan belt Europe.