Middle Permian smaller foraminifers from the Maokou Formation at the Tieqiao section, Guangxi, South China

Permian (Artinskian to Wuchapingian) conodont biostratigraphy in the Tieqiao section, Laibin area, South China

“…The Permian strata measure 1307 m thick and comprise the Maping, Chihsia, Maokou, Heshan, Wuchiaping and Talung Formations, spanning the earliest Permian (Asselian) to the Permian-Triassic boundary (Sha et al, 1990). The section is very fossiliferous with foraminifers, calcareous algae, crinoids, sponges and corals being prolifically abundant (e.g., Wang and Sugiyama, 2000;Bucur et al, 2009;Zhang et al, 2015), whilst bivalves and ammoinods occur less frequently. Well-preserved Zoophycos trace fossils are also abundant (Gong et al, 2010).…”

Carbon isotope perturbations and faunal changeovers during the Guadalupian mass extinction in the middle Yangtze Platform, South China

“…A mass extinction occurred in the Guadalupian epoch (Jin, Zhang & Shang, 1994; Stanley & Yang, 1994; Clapham, Shen & Bottjer, 2009), called the end-Guadalupian mass extinction or pre-Lopingian crisis (Jin, Zhang & Shang, 1994; Stanley & Yang, 1994; Shen & Shi, 1996, 2002; Wang & Sugiyama, 2000) or mid-Capitanian mass extinction (Wignall et al 2009 b ; Bond et al 2010, 2015). This bio-crisis affected marine taxa including fusulinids, small foraminifers, corals, brachiopods, bivalves and ammonoids (Jin, Zhang & Shang, 1994; Wang & Sugiyama, 2000; Weidlich, 2002; Isozaki & Aljinović, 2009; Wei et al 2012; Hada et al 2015; Zhang, Wang & Zheng, 2015). Several geological events have been proposed as the main cause of the mass extinction, including Emeishan volcanism (Zhou et al 2002; Wignall et al 2009 a ; Sun et al 2010), large-scale sea-level fall and loss of shallow-marine habitat (Chen, George & Yang, 2009; Wignall et al 2009 b ; Qiu et al 2014), cooling (Isozaki, Kawahata & Minoshima, 2007; Isozaki, Aljinovic & Kawahata, 2011; Kofukuda, Isozaki & Igo, 2014) and marine anoxia (Isozaki, 1997; Saitoh et al 2013 b ; Zhang et al 2015; Wei et al 2016).…”

Paleogeographic implications of the Permian shallow marine carbonates in the eastern Lake Van region (eastern Turkey): Foraminiferal biostratigraphic and sequence stratigraphic constraints

“…The fossil distributions documented in this study reveal that during the late Capitanian, Eastern Anatolia had similar smaller foraminiferal assemblages to the Taurides (Turkey; Altıner et al, 2000;Altıner & Şahin, 2012), Iran (Kolodka et al, 2012), Tunisia (Ghazzay et al, 2015), Hungary (Théry, Vachard, & Dransart, 2007;Wignall et al, 2012), South China (Gaillot, Vachard, Galfetti, & Martini, 2009;Tong & Shi, 2000;Zhang et al, 2015), and Japan (Kobayashi, 2012), although, the fusulinids are relatively sporadic in the region, similar to the Western Tethyan realm.…”

“…Most of these taxa are long ranging and extend from the Capitanian to the top of the Permian. However, some forms, like Rectoformata , is considered as an important group for the Capitanian (Okuyucu, ; Zhang, Wang, & Zheng, ), Dunbarula is mainly recorded in the Capitanian stage (Leven, ), and Reichelina appears in the late Capitanian (Ghazzay et al, ; Nestell & Nestell, ; Ota & Isozaki, ; Wilde & Rudine, ; Yang & Yancey, ). Subsequently, a late Capitanian age up to the Capitanian/Wuchiapingian boundary is assigned to this interval, based on the specific foraminiferal assemblages and the disappearance of all schwagerinids.…”

“…Depositional sequences and stratigraphic tracts have been described by microfacies changes and their vertical stacking patterns (Catuneanu et al, 2009;Schlager, 2005). Jin et al (1994) and Yang, Liu, and Shi (2004) suggested that the disappearance of the keriotheca-walled fusulinids, especially of those schwagerinids and neoschwagerinids corresponds to the Guadalupian-Lopingian boundary, while most recent studies proposed that these forms became extinct before this boundary, within the Capitanian stage (Altıner & Özgül, 2001;Bond et al, 2010;Ghazzay, Vachard, & Razgallah, 2015;Groves & Wang, 2013;Isozaki, Aljinović, & Kawahata, 2011;Ota & Isozaki, 2006;Wignall et al, 2009) Rectoformata, is considered as an important group for the Capitanian (Okuyucu, 2007;Zhang, Wang, & Zheng, 2015), Dunbarula is mainly recorded in the Capitanian stage (Leven, 1993), and Reichelina appears in the late Capitanian (Ghazzay et al, 2015;Nestell & Nestell, 2006;Ota & Isozaki, 2006;Wilde & Rudine, 2000;Yang & Yancey, 2000). Subsequently, a late Capitanian age up to the Capitanian/Wuchiapingian boundary is assigned to this interval, based on the specific foraminiferal assemblages and the disappearance of all schwagerinids.…”