Lujuantun Fm
Type Locality and Naming
The type section lies about 3 km southeast of the Mingcheng Railway Station of Panshi County, Jilin. It was named by Changchun College of Geology and Jilin Party of Regional Geological Survey in 1961.
Synonym: Luquantun Fm
Lithology and Thickness
Siltstone-Sandstone and Limestone. Littoral-neritic clastic rock and carbonate rock formations. The Lower and Middle parts are dominated by gray-black siltstone and yellow-green to gray-yellow feldspar-rich quartz sandstone, intercalated with limestone, marl lenses and fine-grained sandstone and siltstone. Upper part is composed of thick-bedded limestone and black chert nodule-bearing limestone interbedded with gray-yellow feldspar-rich quartz sandstone, fine-grained sandstone and siltstone. The limestone is rich in corals and the siltstone contains plants, thickness >2450 m.
Relationships and Distribution
Lower contact
Unconformable contact with the underlying Mid-Devonian Wangjiajie Fm
Upper contact
Conformable contact with the overlying Mopanshan Fm
Regional extent
Mainly distributed along Panshi to Shuangyang and in Liaoyuan City.
GeoJSON
Fossils
Type section yields Corals Lithostrotion asiatica, Clisaxophyllum sp., Aulina senex, Carcinophyllum magnum, Dibunophyllum hochangpingense, Yuanophyllum sp., Arachnolasma sinense and A. sinense var. aichiapingense; Brachiopods Gigantoproductus latissimus, G. bedelburgensis and G. cf. irregularis; fusulinid Eostaffella sp.; Plants Neuropteris gigantea, N. cf. pseudogigantea, Calamites sp., Pecopteris sp., Cordaites sp., etc.
Age
Depositional setting
It is interpreted as littoral-neritic clastics and carbonates.
Additional Information