Laohugou Fm
Type Locality and Naming
The type section is located at Laohugou, Lingyuan County, Liaoning. It was named by Shenyang Institute of Geology and mineral resources (Shenyang Geological Survey Center, China Geological Survey) in 1970 and firstly used for publication by the Liaoning regional stratigraphic chart compilation group in 1978.
Synonym:
Lithology and Thickness
It is characterized by the brown, yellow-green sandstone and conglomerate intercalated with grey, gray-black siltstone, shale and thin coal seams or coal streak. The thickness is 68.1 to 400 m.
Relationships and Distribution
Lower contact
In western part of Liaoning province, the Laohugou Fm is disconformable in contact to the underlying Hongla Fm or Houfulongshan Fm
Upper contact
It is in fault contact with the overlying Middle Jurassic Beipiao Fm, or Xinlonggou Fm
Regional extent
This formation is distributed in Laohugou of Lingyuan, Yangcaogou of Beipiao, Boluo and Yingzi of Kuntou, Shimengou of Chaoyang, Shennangou of Xiaofang and other places in western Liaoning.
GeoJSON
Fossils
Plants: Neocalamites shanxiensis, Dictyophyllum nathorsti, Clathropteris meniscioides, Cladophlebis gracilis, Lepidopteris toreziensis, Glossophyllum shensiense. And bivalve fossils and conchostracan fossils and fossil spore and pollens.
Age
Depositional setting
It is interpreted as lacustrine or swamp facies.
Additional Information