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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Indian Peninsula
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India (1)
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Atlantic Ocean
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North Atlantic
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Flemish Cap (1)
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Jeanne d'Arc Basin (1)
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Northeast Atlantic
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Galicia Bank (1)
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Iberian abyssal plain (1)
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Northwest Atlantic (1)
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Europe
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Alps
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Central Alps (2)
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Swiss Alps
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Eastern Swiss Alps (1)
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Western Alps (1)
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Central Europe
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Switzerland
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Graubunden Switzerland (1)
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Swiss Alps
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Eastern Swiss Alps (1)
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Grand Banks (1)
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Indian Ocean
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Arabian Sea
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Gulf of Aden (1)
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Lusitanian Basin (1)
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Mediterranean Sea
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West Mediterranean
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Gulf of Lion (1)
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Newfoundland Basin (2)
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geologic age
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Mesozoic
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Cretaceous (1)
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Jurassic (1)
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Paleozoic
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Permian (1)
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igneous rocks
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igneous rocks
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plutonic rocks
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ultramafics (1)
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metamorphic rocks
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metamorphic rocks
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metasedimentary rocks (1)
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minerals
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silicates
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orthosilicates
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nesosilicates
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zircon group
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zircon (1)
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Primary terms
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Asia
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Indian Peninsula
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India (1)
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Atlantic Ocean
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North Atlantic
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Flemish Cap (1)
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Jeanne d'Arc Basin (1)
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Northeast Atlantic
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Galicia Bank (1)
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Iberian abyssal plain (1)
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Northwest Atlantic (1)
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crust (3)
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deformation (1)
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Europe
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Alps
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Central Alps (2)
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Swiss Alps
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Eastern Swiss Alps (1)
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Western Alps (1)
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Central Europe
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Switzerland
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Graubunden Switzerland (1)
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Swiss Alps
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Eastern Swiss Alps (1)
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faults (1)
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geophysical methods (1)
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igneous rocks
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plutonic rocks
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ultramafics (1)
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Indian Ocean
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Arabian Sea
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Gulf of Aden (1)
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mantle (2)
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Mediterranean Sea
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West Mediterranean
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Gulf of Lion (1)
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Mesozoic
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Cretaceous (1)
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Jurassic (1)
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metamorphic rocks
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metasedimentary rocks (1)
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Mohorovicic discontinuity (1)
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Ocean Drilling Program
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Leg 103
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ODP Site 637 (1)
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ODP Site 638 (1)
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ODP Site 639 (1)
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ODP Site 640 (1)
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ODP Site 641 (1)
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Leg 149
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ODP Site 900 (1)
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ODP Site 901 (1)
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Leg 173
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ODP Site 1065 (1)
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ODP Site 1067 (1)
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ODP Site 1068 (1)
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ODP Site 1069 (1)
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Leg 210 (1)
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orogeny (1)
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paleogeography (2)
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Paleozoic
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Permian (1)
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plate tectonics (1)
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sedimentary rocks
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clastic rocks (1)
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sediments (2)
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tectonics (2)
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sedimentary rocks
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sedimentary rocks
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clastic rocks (1)
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sediments
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sediments (2)
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Tectono-sedimentary evolution of a fossil ocean-continent transition: Tasna nappe, central Alps (SE Switzerland)
Long-lived mega fault-scarps and related breccias at distal rifted margins: insights from present-day and fossil analogues
Abstract We investigate the evolution of the Iberia–Newfoundland margin from Permian post-orogenic extension to Early Cretaceous break-up. We used a Quantitative Basin Analysis approach to integrate seismic stratigraphic interpretations and drill-hole data of two representative sections across the Iberia–Newfoundland margin with kinematic models for lithospheric thinning and subsequent flexural readjustment. We model the distribution of extension and thinning, palaeobathymetry, crustal structure, and subsidence and uplift history as functions of space and time. We start our modelling following post-orogenic extension, magmatic underplating and thermal re-equilibration of the Permian lithosphere. During the Late Triassic–Early Jurassic, broadly distributed, depth-independent lithospheric extension evolved into Late Jurassic–Early Cretaceous depth-dependent thinning as crustal extension progressed from distributed to focused deformation. During this time, palaeobathymetries rapidly deepened across the margin. Modelling of the southern and northern profiles highlighted the rapid development of crustal deformation from south to north over a 5–10 myr period, which accounts for the rapid change in Tithonian–Valanginian, deep- to shallow-water sedimentary facies between the Abyssal Plain and the adjacent Galicia Bank, respectively. Late-stage deformation of both margins was characterized by brittle deformation of the remaining continental crust, which led to exhumation of subcontinental mantle and, eventually, continental break-up and seafloor spreading.