Home Multi-Country Search About Admin Login
Cenozoic
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Neoproterozoic
Mesoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Leigongwu Formation
Click to display on map of the Ancient World at:
Leigongwu Fm base reconstruction

Leigongwu Fm

Period: 
Neoproterozoic

Age Interval: 
latest Nanhuan (latest Cryogenian), Nh (60, 61, 62)


Province: 
Zhejiang, Anhui

Type Locality and Naming

Central-west Zhejiang. The Leigongwu Fm was named by Liu Hongyun and Sha Qing'an in 1959. The typical section is situated in Leigongwu in Changshan County, Zhejiang Province.

Synonym: （雷公坞组）


Lithology and Thickness

The Leigongwu Formation is subdivided into three members. Lower member is composed of bluish gray to greenish gray tilly pebbly sandstone, pebbly mudstone intercalated with minor siltstone and silty mudstone, with good stratification and developed flat-beddings and occasionally oblique beddings. Middle member is dominated by black shale, manganiferous siliceous shale, manganiferous shale and dolomite, chert and manganiferous sandstone and siltstone. Among them, the manganiferous carbonate rock commonly shows thin-bedded, lenticular and edgewise structures. Upper member consists of tilly pebbly sandstone, intercalated with minor mudstone and silty mudstone, which is dominated by black gray and dark green, with no beddings and complex pebble composition. It is 2-10 m thick.

[Figure: Lithology of Leigongwu Fm]


Lithology Pattern: 
Glacial till


Relationships and Distribution

Lower contact

It rests conformably on the underlying Datangpo Fm

Upper contact

It underlies conformably the overlying Xifengsi Fm

Regional extent

Central-west Zhejiang and southern Anhui.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[119.44,30.85],[119.75,30.74],[119.82,30.62],[119.62,30.46],[119.44,30.23],[119.08,30],[118.88,29.74],[118.53,29.46],[118.27,29.15],[118.07,28.7],[117.46,28.51],[116.67,28.16],[116.02,27.74],[115.36,27.33],[115.41,27.53],[115.71,27.86],[115.86,28.5],[115.77,29.06],[115.95,29.35],[116.48,29.69],[117,30.08],[117.54,30.42],[118,30.73],[118.63,30.91],[119.44,30.85]]]]}}

Fossils

The upper part yields microplants Leiomarginata sp., Leiopsophosphaera densa, Margominuscula sp., Trachysphaeridium sp., Asperatopsophosphaera sp. etc.


Age 

latest Nanhuan (latest Cryogenian); with upper glacial till probably the Marinoan glacial (latest Cryogenian) but apparently including some pre-till lithologies?

Age Span: 

    Beginning stage: 
Cryogenian

    Fraction up in beginning stage: 
0.9

    Beginning date (Ma): 
643.50

    Ending stage: 
Cryogenian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
635.00

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Extracts from The Neoproterozoic Erathem (chapter in Stratigraphic Lexicon of China, draft of 2022) by Gao Linzhi, Ding Xiaozhong, Zhang Chuanheng, Zhang Heng.