Itinerary 6. Elevated Ranges and Interior Basins of the Axial Zone: The Conflent Basin and its Surrounding Massifs
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5 juin 2022
- handle: 10670/1.2ecebi
- isbn: 978-3-030-84266-6
- hal: hal-03996102
- doi: 10.1007/978-3-030-84266-6_11
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info:eu-repo/semantics/altIdentifier/doi/10.1007/978-3-030-84266-6_11
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Eogene Paleogene Palaeogene Instruction and study--Methods Eogene Paleogene Palaeogene Neogene Neocene Neogene Neocene Prehistoric antiquities Prehistory Prehistoric archaeology Neogene Neocene Eogene Paleogene Palaeogene Eogene Paleogene Palaeogene Eogene Paleogene Palaeogene Social science Sciences, Social Human sciences Social studies Behavioral sciences Pireneus Pirineos Pyrene Pirineus Pyrenees (France and Spain) Pyrenaei Montes Frontons Neogene Paleontology--Neocene Neocene Neogene Neocene Paleobotany--Neocene Orogenesis Tectogenesis Mountain building Early man Prehistoric human beings Cavemen (Prehistoric peoples) Prehistoric humans Man, Prehistoric Prehistory Prehistoric archaeology Natural scenery Countryside Landscape Scenery Scenic landscapes Neogene Geology, Stratigraphic--Neocene Neocene Proof Hours (Time) Eras Caverns Grottoes Rockshelters Rock shelters Fluvial deposits Alluvial deposits Deposits, Alluvial Eogene Paleogene Palaeogene Eogene Paleogene Palaeogene Instruction and study--Methods Lists of events Biography--Chronology Chronological lists basin paysage représentation du paysageCiter ce document
Marc Calvet et al., « Itinerary 6. Elevated Ranges and Interior Basins of the Axial Zone: The Conflent Basin and its Surrounding Massifs », HAL-SHS : archéologie, ID : 10.1007/978-3-030-84266-6_11
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Résumé
Itinerary 6 follows the Têt River valley and opens a window onto the Paleozoic geological structure of the Axial Zone (lithostratigraphy, Hercynian tectonics). Paleogene tectonics, in contrast, has left limited direct evidence of the Alpine orogeny in this part of the Axial Zone, suggesting that the Hercynian basement in the eastern Pyrenees was not intensely deformed by basement nappes and thrusts during Alpine collision. The tectonic record can mostly only be inferred by proxy methods rather than by direct observation, mainly from rock-cooling histories based on low-temperature thermochronology. The main focus is thus on Neogene tectonics and geomorphological evolution. Both aspects are conspicuous in the landscape of the Conflent half-graben, its sediment fill, the faceted spurs along its boundary fault scarp, and the successive generations of pediments cut into the flanks of the surrounding footwall massifs. Another focus is the incision chronology of the Têt valley, which can be estimated by dating successive generations of alluvial deposits trapped in limestone caves on canyon flanks near Villefranche and alluvial terrace deposits that extend deep into the Axial Zone along the Têt River. These have been used as proxies for estimating rates of neotectonic uplift of the mountain range.