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Wotuoshan Formation
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Wotuoshan Fm base reconstruction

Wotuoshan Fm

Period: 
Devonian

Age Interval: 
D22 (3), Middle Devonian


Province: 
Inner Mongolia

Type Locality and Naming

The type section is located west of Zhusilenghairxi, north side of Badanjilin Desert, West Inner Mongolia. It was named by Geological Research Party, Ningxia Bureau of Geology and Mineral Resources and Xi’an Institute of Geology and Mineral Resources in 1977, and published by "Regional Report of Yagan Geological Map and Guaizihu Geological Map” (1:200,000) in 1981, and Zheng Zhaochang et al. adopted it in 1982.


Lithology and Thickness

Tuffaceous sandstone. Basal part is dominated by gray conglomerate with thick-bedded sandy conglomerate. Lower and middle parts are composed of grayish-green tuffaceous sandstone and calcareous sandstone intercalated with thin-bedded limestone. Upper part is characterized by dark-gray, grayish-brown, purple and grayish-green thin- to medium-grained feldspathic quartz sandstone, intercalated with medium-bedded coarse-grained feldspathic quartz sandstone. The total thickness is 530 m


Lithology Pattern: 
Volcanic_ash


Relationships and Distribution

Lower contact

It has conformable contact with the underlying Yikewusu Fm.

Upper contact

It has conformable contact with the overlying Xipingshan Fm.

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[99.16,43.03],[99.31,42.16],[101.33,41.62],[102.81,42.11],[101.42,43.05],[99.16,43.03]]]]}}

Fossils

No fossils have been reported.


Age 

The age is inferred as late Middle Devonian.

Age Span: 
S

    Beginning stage: 
Givetian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
385.30

    Ending stage: 
Givetian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
378.90

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Hou Hongfei)