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Progress in Earth and Planetary Science
Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: Early Jurassic extrinsic solar system dynamics versus intrinsic Earth processes: Toarcian sedimentation and benthic life in deep-sea contourite drift facies, Cardigan Bay Basin, UK

Fig. 1

Location maps. a Toarcian palaeogeography with localization of the Laurasian Seaway and Mochras borehole. b Enlargement of the area in the frame a showing major basins and elevated areas in the Toarcian times (after Cope et al. 1992, amended) and enhanced thermohaline circulation from the North from the late Falciferum Subzone on, with generally improved oxygenation of the bottom (circulation intensity and average oxygenation achieved its highest level in the late Bifrons and Variabilis to earliest Thouarsense zones. CBB Cardigan Bay Basin. c The same map showing the inferred current flow paths during the Tenuicostatum Zone–Exaratum Subzone and), the latest Thouarsense–Dispansum Zone and (to a lesser extent) Pseudoradiosa Zone thermal anomalies related to a strengthening of warm equatorial Tethyan westward currents and associated with the conspicuous ichnodiversity/oxygenation crisis in Mochras. Note the pivotal position of the Cardigan Bay Strait (now Cardigan Bay Basin – CBB) in the Laurasian Seaway between Boreal Sea and Peri-Tethys domain

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