Itinerary 5. Aspects of the North-Pyrenean Zone and its Foreland: Agly, Fenouillèdes, Razès, Pays de Sault
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5 juin 2022
- handle: 10670/1.t64kyd
- isbn: 978-3-030-84266-6
- hal: hal-03996446
- doi: 10.1007/978-3-030-84266-6_10
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info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-030-84266-6_10
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Marc Calvet et al., « Itinerary 5. Aspects of the North-Pyrenean Zone and its Foreland: Agly, Fenouillèdes, Razès, Pays de Sault », HAL-SHS : archéologie, ID : 10.1007/978-3-030-84266-6_10
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Itinerary 5 offers a discovery of Alpine geological structures in the North-Pyrenean Zone and clues to the area’s geomorphological evolution during the Neogene and Quaternary. It crosses the Internal Metamorphic Zone (IMZ), the folded and faulted Mesozoic cover sequence, northern outposts of Paleozoic basement sheared off the Axial Zone along north-vergent thrusts, and offers a traverse through the Sub-Pyrenean fold belt (Western Corbières, Plantaurel, Petites Pyrénées) all the way to the synorogenic Paleogene conglomerate sequences (Palassou series). Some major tectonic discontinuities of the Alpine crustal fabric, e.g., the North-Pyrenean Fault and North-Pyrenean Frontal Thrust, can be inspected at close quarters. From a geomorphological perspective, the itinerary offers clues for explaining links between different generations of erosion surfaces encountered during previous itineraries, their respective base levels, and the tectonic regimes that initially drove and subsequently interrupted their completion. Their respective ages and past connections with the Paleogene conglomerates of the Aquitaine foreland are discussed. Groundwater karst landforms in the thick Jurassic and Lower Cretaceous carbonate cover sequences, which throughout the area are widespread and conspicuous, also provide important clues to landscape evolution and palaeoaltimetry.