Artinskian Conodonts From the Dingjiazhai Formation of the Baoshan Block, West Yunnan, Southwest China

Early Permian ammonoids from the Kaeng Krachan Group of the Phatthalung-Hat Yai area, southern peninsular Thailand

“…This view is also broadly consistent with a Bolorian age assignment by Ueno (2003) for the basal part of the Ratburi Limestone or the transitional beds between the Kaeng Krachan Group and the Ratburi Limestone based on the Monodiexodina fauna. The present conclusion further means that the continental margin environment of the Sibumasu Block drastically changed at around Bolorian time, from a cool, clasticdominant shelf environment to a temperate to subtropical, carbonate platform due to a rapid northward drift after the middle Artinskian rifting of the eastern Cimmerian continent from main Gondwanaland (Ueno et al, 2002). Moreover, global warming in latest Early Permian time (Leven, 1994) could also be substantially responsible for this rapid environmental change.…”

The Permian antitropical fusulinoidean genus Monodiexodina: Distribution, taxonomy, paleobiogeography and paleoecology

“…In the Southern Transitional Zone, Monodiexodina is mainly distributed in the eastern part of the Cimmerian continent (SE Pamir, Qiangtang Block in the easternmost Karakorum and Tibet, and Sibumasu Block), which, according to Ueno et al (2002), separated from mainland Gondwanaland at around Artinskian time. Among these eastern Cimmerian areas, it is known that Gondwana glaciation had widely prevailed in the Qiangtang and Sibumasu blocks during early Early Permian (pre-Artinskian) time, forming characteristic glaciogene diamictites (e.g.…”

Early and Middle Permian paleoclimates of the Baoshan Block, western Yunnan, China: insight from carbonates

“…The boundary along the fault is adopted here, following most sedimentological and biogeographical publications (e.g. Jin, 2002;Ueno et al, 2002;Wang and Sugiyama, 2002) (Fig. 1).…”

“…After major revision of some of the taxonomical identifications (e.g. foraminifers by Fang et al, 2000;Ueno, 2003;Wang et al, 2001), and the finding of conodonts (Sweetognathus bucaramangus Rabe, S. whitei Rhodes, Mesogondolella bisselli Clark and Behnken) from carbonates in upper part of the succession (Ueno et al, 2002), the formation is now established firmly as Early Permian: the basal part possibly no older than Asselian, on the brachiopod data, and Fig. 3.…”

“…Based on the rarity of verbeekinid and neoschwagerinid species in the Baoshan Block, Ueno (2003) suggested that the eastern Cimmerian Continent was far from the equato-tropical Cathaysian domain and probably lay in the warm temperate or subtropical zone until the end of the Permian. The entire fossil fauna from the limestone unit is interpreted as a middle latitudinal, non-tropical, but still substantially a Gondwana-influenced assemblage (Ueno et al, 2002).…”