Climate changes during the Early–Middle Triassic transition in the E. Iberian plate and their palaeogeographic significance in the western Tethys continental domain

摘要: Abstract Until recently the climate of Early–Middle Triassic at low latitudes was broadly considered as generally temperate-warm with no major oscillations. This work examines this period through a detailed study sedimentary, plant, soil and mineral records continental rocks (Buntsandstein facies) in eastern Iberian basins. Our findings indicate temporal variations for these near equator (10°–14°N) regions unveil significance such southern Laurasian domain. The Iberia's Early mainly dominated by alternating brief ( Although beginning Anisian (Aegean) represented arid semi-arid to subhumid intervals, during Bithynian Pelsonian clearly wetter climates are recorded succession consisting semi-humid intervals. general tendency interrupted three short but marked two humid intervals late Bithynian, one Bithynian/Pelsonian boundary. Iberia crossed prominent irregular highs separating corridors or isolated areas. palaeogeography, prevailing since Variscan tectonics, conditioned dominant their geographical distribution. No clear belts developed conditions. However, internal zones separated elevated areas identified. palaeogeographic configuration latitudinal position determined central southernmost border Laurasia, beyond which more conditions extended towards reaching present-day Moroccan Meseta Argana Basin.