The Aquitaine Basin is the second largest Mesozoic and Cenozoic sedimentary basin in France after the Paris Basin, occupying a large part of the country's southwestern quadrant. Its surface area covers 66,000 km onshore. It formed on Variscan basement which was peneplained during the Permian and then started subsiding in the early Triassic. The basement is covered in the Parentis Basin and in the Subpyrenean Basin—both sub-basins of the main Aquitaine Basin—by 11,000 m of sediment.
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Aquitaine Basin in the context of Bayonne
Bayonne (French: [bajɔn] in Basque and Gascon Baiona) is a city in southwestern France near the Spanish border. It is a commune and one of two subprefectures in the Pyrénées-Atlantiques department, in the Nouvelle-Aquitaine region also known as French Basque Country.
Bayonne is located at the confluence of the Nive and Adour Rivers, in the northern part of the cultural region of the Basque Country. It is the seat of the Communauté d'agglomération du Pays Basque which roughly encompasses the western half of Pyrénées-Atlantiques, including the coastal city of Biarritz. The area also constitutes the southern part of Gascony, where the Aquitaine Basin joins the beginning of the Pre-Pyrenees.
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