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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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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 (2)
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Northeast Atlantic
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Galicia Bank (1)
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Iberian abyssal plain (2)
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Northwest Atlantic (6)
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Atlantic region (1)
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Canada
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Eastern Canada
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Newfoundland and Labrador
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Newfoundland (4)
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Europe
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Southern Europe
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Iberian Peninsula (4)
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Italy
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Apennines
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Northern Apennines (1)
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Grand Banks (1)
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Lusitanian Basin (1)
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Newfoundland Basin (5)
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Pacific Ocean
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North Pacific
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Northwest Pacific (1)
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West Pacific
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Northwest Pacific (1)
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commodities
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petroleum (2)
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elements, isotopes
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isotope ratios (1)
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isotopes
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stable isotopes
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Hf-177/Hf-176 (1)
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metals
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actinides
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uranium (1)
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hafnium
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Hf-177/Hf-176 (1)
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fossils
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Invertebrata
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Cnidaria
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Anthozoa (1)
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geochronology methods
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Ar/Ar (2)
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U/Pb (2)
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geologic age
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Cenozoic (1)
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Mesozoic
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Cretaceous
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Albian (1)
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Aptian (2)
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Barremian (2)
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Upper Cretaceous
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Cenomanian (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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diabase (1)
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gabbros (1)
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volcanic rocks
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basalts
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mid-ocean ridge basalts (1)
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metamorphic rocks
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metamorphic rocks
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metaigneous rocks
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serpentinite (1)
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metasomatic rocks
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serpentinite (1)
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minerals
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silicates
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chain silicates
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amphibole group
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clinoamphibole
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hornblende (1)
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orthosilicates
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nesosilicates
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zircon group
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zircon (2)
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sheet silicates
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mica group
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phlogopite (1)
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serpentine group
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serpentine (1)
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Primary terms
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absolute age (3)
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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 (2)
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Northeast Atlantic
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Galicia Bank (1)
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Iberian abyssal plain (2)
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Northwest Atlantic (6)
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-
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Atlantic region (1)
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Canada
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Eastern Canada
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Newfoundland and Labrador
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Newfoundland (4)
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Cenozoic (1)
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crust (3)
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data processing (1)
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Deep Sea Drilling Project
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Leg 12
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DSDP Site 111 (1)
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deformation (2)
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diagenesis (1)
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Europe
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Southern Europe
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Iberian Peninsula (4)
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Italy
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Apennines
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Northern Apennines (1)
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faults (2)
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geophysical methods (6)
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igneous rocks
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plutonic rocks
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diabase (1)
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gabbros (1)
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volcanic rocks
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basalts
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mid-ocean ridge basalts (1)
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intrusions (2)
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Invertebrata
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Cnidaria
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Anthozoa (1)
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isotopes
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stable isotopes
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Hf-177/Hf-176 (1)
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mantle (2)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (1)
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Aptian (2)
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Barremian (2)
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Upper Cretaceous
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Cenomanian (1)
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Jurassic (1)
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metals
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actinides
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uranium (1)
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hafnium
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Hf-177/Hf-176 (1)
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metamorphic rocks
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metaigneous rocks
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serpentinite (1)
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metasomatic rocks
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serpentinite (1)
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metamorphism (2)
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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 110 (1)
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Leg 125 (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 (2)
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ODP Site 1068 (2)
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ODP Site 1069 (2)
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ODP Site 1070 (2)
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Leg 210
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ODP Site 1276 (4)
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ODP Site 1277 (3)
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ocean floors (1)
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orogeny (1)
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Pacific Ocean
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North Pacific
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Northwest Pacific (1)
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West Pacific
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Northwest Pacific (1)
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paleogeography (2)
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Paleozoic
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Permian (1)
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petroleum (2)
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plate tectonics (5)
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sea-floor spreading (3)
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sedimentary rocks
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clastic rocks
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arenite (1)
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sandstone (1)
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sedimentary structures
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biogenic structures
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bioherms (1)
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sedimentation (2)
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sediments
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clastic sediments
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sand (1)
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tectonics
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salt tectonics (1)
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sedimentary rocks
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sedimentary rocks
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clastic rocks
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arenite (1)
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sandstone (1)
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sedimentary structures
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mounds (1)
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sedimentary structures
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biogenic structures
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bioherms (1)
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sediments
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sediments
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clastic sediments
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sand (1)
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Leg 210
Detrital signatures of clastic serpentinite in tectonically diverse settings and interpretation of an example from the Northern Apennines
Timing of initial seafloor spreading in the Newfoundland-Iberia rift
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.