Syn-tectonic sedimentary evolution of the continental late Palaeozoic-early Mesozoic Erill Castell-Estac Basin and its significance in the development of the central Pyrenees Basin

摘要: Abstract The break-up of Pangea remains one the most interesting moments in Earth's history. In Pyrenees this geological moment is represented by continental successions, giving rise to a magnificent example creation new basins and their sedimentary fill. work we present study based on stratigraphy, sedimentology synsedimentary tectonics data; basis, define for first time different tectono-stratigraphic phases that occurred evolution incipient basin Erill Castell-Estac Basin (Southern Pyrenees, NE Spain). Traditionally, four lithostratigraphic units have been defined area grouped into units, but propose three cycles characterized fining upward trends separated angular unconformities. cycle (late Carboniferous-early Permian) strongly related intense volcanic activity isolated sub-basins. upper part cycle, fluvial lacustrine deposits were deposited transtensive tectonic context. second (early-middle Permian), connection between sub-basins started main are fluvial, relative playa-lake environments with minor influence. Finally, third (Early-Middle Triassic) meandering scarce no syn-depositional context extensional, at top last Mesozoic marine incursions preserved. Detailed description provides filling strike-slip key point further considerations still unknown role Carboniferous Triassic Pyrenean break-up.