Rongxi Fm
Type Locality and Naming
The name was given by Ge Zhizhou et al in 1979. The type section is at the roadside from Xiushan to Rongxi, approximately 6 km southeast of Rongxi, Xiushan County in southeastern Sichuan Province.
Synonym: (溶溪组)
Lithology and Thickness
It consists of purplish red, yellow green, gray green, variegated pelite, silty pelite and siltstone; both its top and base are characterized by purplish red silty pelite. It is 258 m in thickness at the type section locality.
Relationships and Distribution
Lower contact
Continuous sedimentation is recorded for the formation in relation with the underlying Xiaoheba Fm or the Majiaochong Fm
Upper contact
Continuous sedimentation is recorded for the formation in relation with the overlying Xiushan Fm
Regional extent
The formation is widely distributed in the southeastern Sichuan Province, northeastern of Guizhou Province, northwestern of Hunan Province and southwestern of Hubei Province with similar lithology and thickness.
GeoJSON
Fossils
Rare fossils with low differentiation are only found, including brachiopods Nalivkinia, Nucleospira, Striispirifer; trilobite Astroproetus; graptolites Hunanodendrum typicum; conodont Neoprioniodus excavatus, Distomodus kentuckyensis, Spathognathodus parahassi, Sp. guizhouensis, etc.；chitinozoa Conochitina daozhenensis, and bivalve, crinoid, etc.
Age
Depositional setting
Additional Information