Mangshan Gr
Type Locality and Naming
The type section is located in Mangshan area, 3 km west of Duyun City, Guizhou, but the exact locality is unknown. The reference section is nearby Banzhuang Village of Duyun District (107o29’E-26o18’N). It was named by Yue Senxun in 1929.
Synonym: Mangshan Quartzose Sandstone
Lithology and Thickness
It is composed of gray, grayish-white and yellowish-brown, thick-bedded to massive quartz sandstone, intercalated with pebble-bearing quartz sandstone. The upper part consists mainly of purple-red sandstone and siltstone. The thickness is 249 m.
Correlative are two separate formations at Mairangzhai of Wudang in Guiyang: Upper - Mazongling Fm, consists of grayish-yellow to grayish-white quartz sandstone intercalated with shale. Lower - Wudang Fm, is composed of purplish-red thin- to medium-bedded fine-grained quartz sandstone, clayey siltstone and iron-bearing siltstone.
Relationships and Distribution
Lower contact
It has a disconformable basal contact onto the underlying Lower Silurian (Hanjiadian Gr or Gaozhaitian Gr)
Upper contact
Conformable contact with the overlying Dushan Fm
Regional extent
It is distributed at Kaili, Duyun and Guiyang in southern Guizhou Province.
GeoJSON
Fossils
It contains flora Zosterophyllum sp., Drepanophycus spinaeformis.
Age
Depositional setting
It is interpreted as a backshore facies.
Additional Information