Erqingshan Fm
Type Locality and Naming
North-central Shandong. The Erqingshan Fm was named by You Wencheng (1979). The type section is located in Erqingshan Hill (2130 upland), Xinxin Town of Cangshan County, Shandong Province. Coordinate: E117º49´00´´; N34 º 49´00´´. Lower-middle formation in Tumen Gr.
Synonym: (二青山组)
Lithology and Thickness
The Erqingshan Fm consists mainly of quartz sandstone, light grey calcareous shale interbedded with muddy limestone with stromatolites, microplants and macrofossils of algae. It is 10-140 m thick. Lower-middle formation in Tumen Gr.
[Figure: The Stratigraphic column of the Tumen Gr (made by Zhang Chuanheng)]
[Figure: Stratification of the Erqingshan Fm in the outcrop]
Relationships and Distribution
Lower contact
It is conformable onto the underlying Heishanguan Fm or unconformable onto the Taishan Complex or metamorphosed granite pluton.
Upper contact
It is disconformably overlain by the Tongjiazhuang Fm.
Regional extent
North-central Shandong. It is developed in Cangshan County and Anqiu- Juxian County, Shandong Province.
GeoJSON
Fossils
Microplants and algae fragments have been found in shale.
Age
Depositional setting
Additional Information