Keziliqiman Fm
Type Locality and Naming
The type section is located at Keziliqiman to the southwest of the Pishan County Town, Xinjiang. It was named by Zhao Zhixin et al., in 1984.
Lithology and Thickness
Limestone. It is divisible into two parts. Lower part is composed of grey-white, light-grey, dark-grey and black-grey medium-, and thick-bedded dolomitic limestone, dolomite and shelly limestone. Its basal part is composed of dolomite. Upper part is composed of interbeds of thin-bedded limestone, shelly limestone together with grey-black siltstone and light-yellow siltstone, intercalated with thin-bedded limestone, shelly limestone and dolomite, with its top part consisting of grey, purple and black-grey calcareous silty siltstone, intercalated with carbonaceous siltstone.Total thickness is 131 m.
Relationships and Distribution
Lower contact
Conformable contact with the medium- and thick-bedded limestone of the underlying Tahaqi Fm.
Upper contact
Regional extent
Distributed in the Tahaqi area of Pishan County (with a thickness of 211 m), the Keziliqiman and Qipan areas of Yecheng County (with a thickness of 283 m), as well as the Heshilapu area of Shache County (with a thickness of 432 m), with its thickness getting smaller in a direction from west to east. In the Qipan area of the western part the overlying marine Qipan Fm and in the Duwa area of eastern part the overlying continental Pusige Fm seem to be in conformable contacts with the formation. The Nanzha Fm (Liu Chao’an, 1991) in the Tadongbei and Bachu areas is corresponding to the formation.
GeoJSON
Fossils
Conodonts represented by Neostreptognathodus pequopensis-Sweetognathus whitei-Lonchodina festive assemblage; Fusulinida represented by the Eoparafusulina shengi-E. instabilis assemblage; Foraminifera as represented by Glomospira, Nodosaria, Eodiscus, Geinitzina; and Corals represented by Eowentzelellites, Lophophyllidium, Zaphrentoides, Paracaninia, etc.
Age
Depositional setting
It is interpreted as shallow-sea littoral deposits.
Additional Information