Sanchazi Gr
Type Locality and Naming
Northeast Liaoning. The Sanchazi Gr was named by Saito in 1943. The type locality is around Sanchazi, Hengdaohezi Township, Tieling County, Liaoning Province. Synonym: The Fanhe Gr and relevant "series" (group) names should be abolished.
Synonym: （三岔子群）
Lithology and Thickness
The Sanchazi Gr is subdivided into the Daposhan Fm, Kangzhuangzi Fm and Guanmenshan Fm from bottom to top. The lower part, Daposhan Fm, is composed of pebbly quartz sandstone sandwiched with variant-grained dolomite. The middle part, Kangzhuangzi Fm, consists of quartz sandstone, slate and microcrystalline dolomite. The upper part, Guanmenshan Fm, is grey intra-clastic dolomite. [See entries for those component formations for more details.]
Relationships and Distribution
Lower contact
It is in unconformable contact with underlying Archean strata.
Upper contact
Conformably overlain by the Tongjiajie Fm (lowest formation of Shuyatun Gr.)
Regional extent
Northeast Liaoning. Based on the outcrops, it distributed east of Tan-Lu Fault, the middle reaches of Fanhe River, north part of Fushun, Tieling City, and east part of Kaiyuan County, Liaoning Province.
GeoJSON
Fossils
The dolomite contains stromatolites, while the slate, microplants.
Age
Depositional setting
Neritic-littoral
Additional Information