Lujiatun Fm
Type Locality and Naming
The type section is located at Dalizi, southwest of Yanjiagou, Lujiatun town, Jiutai County, Jilin. It was named by the Jilin District Geological Survey Group in 1980. And it was firstly used for publication by Zhang Wu and Dong Guoyi in 1983.
Lithology and Thickness
From bottom to top, it is divided into 3 members: (1) Yingbei Mountain conglomerate Member, which is blue-gray conglomerate sandstone; (2) Houdoushan variegated rock Member, mainly variegated sandstone and siltstone; (3) Lujiatun black rock Member, mainly gray, gray-black fine sandstone, siltstone and mudstone. Not reach to the top. Its thickness is 4577 m.
Relationships and Distribution
Lower contact
It has a disconformable contact with the underlying Upper Permian volcanics of the Madatun Fm.
Upper contact
Regional extent
It is strictly distributed in Jiutai County, Jilin.
GeoJSON
Fossils
Bivalves: Palaeonodonta costor, P. opinata, P. obrutschevi, P. pseudolongissima, Microdontella. And plant fossils and conchostracan fossils.
Age
Depositional setting
It is interpreted as the intermountain basin.
Additional Information