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Nandian Formation
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Nandian Fm base reconstruction

Nandian Fm

Period: 
Cretaceous

Age Interval: 
Aptian, (25a)


Province: 
Hebei

Type Locality and Naming

N. Hebei. Named after Nandian close to Qingshila village, Fengning County, Hebei Province. Hebei Bureau of Geology and Mineral Resources, 1989, Regional Geology of Hebei Province, Beijing Municipality and Tianjin Municipality [Geological Memoirs of the Ministry of Geology and Mineral Resources of the People’s Republic of China, (1) Regional Geology, no.15], Beijing: Geological Publishing House, 225. First appeared in a 1975 manuscript by Hebei Regional Geological Survey Team.

Synonym: Xiadian Fm. [NOTE: There is also a "Nandan" Fm in Archean (Shuangshanzi Gr) of Hebei.]


Lithology and Thickness

Sandy shale with interbeds of rudite.


Lithology Pattern: 
Sandy claystone


Relationships and Distribution

Lower contact

Shown by D.P. Xi, X.Q. Wan et al. (2019; Cretaceous chapter of China Integrated Stratigraphy and Timescale) as overlying the Xiguayuan Fm.

Upper contact

Shown by D.P. Xi, X.Q. Wan et al. (2019; Cretaceous chapter of China Integrated Stratigraphy and Timescale) as underlying the Qingshila Fm.

Regional extent


GeoJSON

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Fossils


Age 


Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
117.30

    Ending stage: 
Aptian

    Fraction up in the ending stage: 
0.7

    Ending date (Ma):  
115.66

Depositional setting


Depositional pattern:  


Additional Information


Compiler: