Foraminiferal revision of the Holkerian Stratotype Britain at Barker Scar, Holker Hall, south Cumbria, UK, allows subdivision section into Cf4?, Cf5? and Cf5? subzones (the latter being further subdivided lower Cf5?1 upper Cf5?2 intervals). The base subzone bed C from middle part C, occur 14 m 10.5 m, respectively, below traditional basal boundary K. boundaries these foraminiferal within main i...

Sucrosic dolomite, an important hydrocarbon reservoir, has long been the focus of carbonate sedimentological and reservoir geological studies. This study investigated a kind heterogeneous sucrosic dolomite in Lower Permian Qixia Formation NW Sichuan Basin, which recently location giant natural gas discoveries. The is characterized by coexistence porous euhedral tight anhedral it mainly distribu...