Linjia Fm
Type Locality and Naming
The type section is located at Qiandianzi-Linjiawaizi, Benxi, Liaoning. It was named by Kobayashi in 1942.
Synonym: It was firstly named as “Linjia bed” as the age of Late Cretaceous. And then it was revised as “Linjia series” by Wang Yu, Lu Yanhao and Yang Jingzhi as the age of late Late Cretaceous-Paleocene in 1954. Later, it was revised as Linjia Formation by Pan Guang with the age of Late Permian in 1959.
Lithology and Thickness
Lower part is yellow-green, gray-white conglomerate and sandstone with developed cross-bedding. Upper part is yellow-green feldspar quartz sandstone and purple and black shale. Its thickness is 158.4 m.
Relationships and Distribution
Lower contact
This formation is disconformable in contact to the underlying Zhengjia Fm
Upper contact
Its overlying strata is unclear. The next younger regional unit on schematic stratigraphic section was indicated as the Yihe Fm (= Yaogou Fm ), which is slightly further to the NE (Yihe Basin in Jilin; column TJ67). In E Liaoning region, the next younger unit is the Changliangzi Fm of late-Early Jurassic.
Regional extent
It is distributed in Qiandianzi-Linjiawaizi, Benxi, Liaoning.
GeoJSON
Fossils
Plants: Symopteris-Benxiopteris assemblage; insect and fish scale fossils.
Age
Depositional setting
It is interpreted as a fluvial-lacustrine environment.
Additional Information