Depositional environments and cyclo- and chronostratigraphy of uppermost Carboniferous–Lower Triassic fluvial–lacustrine deposits, southern Bogda Mountains, NW China — A terrestrial paleoclimatic record of mid-latitude NE Pangea

Terrestrial paleoenvironment characterization across the Permian–Triassic boundary in South China

“…The Dongchuan Formation represents the first evidence of redbeds in South China with depositional environment similar to what is known from the Late Permian of North China (Shu and Norris, 1999;Yang et al, 2010;Thomas et al, 2011;Stevens et al, 2011), South Africa (Ward et al, 2000;Gastaldo et al, 2005;Coney et al, 2007), Russia (Benton et al, 2004), Europe (Körner et al, 2003;Schneider et al, 2006;Bourquin et al, 2006Bourquin et al, , 2007Bercovici et al, 2009b), and the Early to Middle Permian of North America (DiMichele et al, 2004(DiMichele et al, , 2005b(DiMichele et al, , 2007, with climate change to drier conditions (Sheldon, 2005). During the end of the Paleozoic, plants had been tracking the effects of global climate change , and South China represents the ultimate place where wetland floras still thrived close to the PTB (DiMichele et al, 2001(DiMichele et al, , 2006bHilton and Cleal, 2007).…”

Paleoecological and paleoenvironmental changes during the continental Middle–Late Permian transition at the SE Iberian Ranges, Spain

“…One diffi culty in particular comes from the need to correlate continental suc cessions with marine given that all of the Permian index fossils are marine, and as a result continental succession has traditionally had poor or inadequate age model precision (Lucas et al, 2006). Examples of this problem range from potentially intractable (Tabor et al, 2011) to unresolved, but potentially resolvable with further work (Yang et al, 2010). As observed in Section 4, without marine correlations, the difficulties of dating continental rocks are enormous and further work should be required to get a better age constraint.…”

Charred wood of Prototaxoxylon from the Wuchiapingian Wutonggou Formation (Permian) of Dalongkou, northern Bogda Mountains, northwestern China

“…Yang et al (2010) found common gleysols and argillisols, and some histosols capping cyclic deposits of perennial meandering streams and freshwater deltas, indicating a humid to subhumid climate with weak precipitation seasonality. Thomas et al (2011) studied the lower Wuchiapingian palaeosol morphologies in the study area and estimated palaeoprecipitation and palaeotemperature on the basis of CIA-K (Chemical Index of Alteration minus Potassium) proxies derived from elemental composition of palaeosol matrix.…”

“…Based on the qualitative and quantitative studies, it is proposed a humid climate with weak precipitation seasonality in the northern Xinjiang during the Wuchiapingian (Yang et al, 2010;Thomas et al, 2011). Yang et al (2010) found common gleysols and argillisols, and some histosols capping cyclic deposits of perennial meandering streams and freshwater deltas, indicating a humid to subhumid climate with weak precipitation seasonality.…”

“…This formation is composed of six upward-fining successions of thick-bedded dark grey and grey conglomerate, medium-coarse sandstone, fine sandstone, thin-bedded siltstone and mudstone deposited in fluvial environment (IGCAGS and IGXBGMR, 1986). It has been suggested that northern Xinjiang had a weakly seasonal humid-subhumid climate in Lopingian (Yang et al, 2010;Thomas et al, 2011;Wan et al, 2014). The variety of the Wuchiapingian flora of this region also indicates a warm and humid climate, which is quite favorable for plant growth (IGCAGS and IGXBGMR, 1986).…”