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Luotuopan Formation
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Luotuopan Fm base reconstruction

Luotuopan Fm

Period: 
Neoproterozoic

Age Interval: 
Middle Qingbaikousan (middle Tonian), Qb (20)


Province: 
Henan

Type Locality and Naming

Central Henan-Hubei border region. The name Luotuopan Fm is derived from the Luotuopan Sandstone named by Wang Zejiu et al. in 1963. The typical section is situated in east Luotuopan east of Putaoyu village in Foguangyu of Yanshi County (Songshan Mt.), Henan Province.

Synonym: （骆驼畔组）


Lithology and Thickness

The Luotuopan Formation is dominantly composed of medium-bedded conglomerate and pebbly coarse sandstone. The basal part of the Luotuopan Fm is brownish yellow medium-grained quartzose sandstone. The top part is yellowish gray medium-bedded, medium- to coarse-grained quartzose sandstone. The basal conglomerates bear well-rounded pebbles, and the top part contains siliceous lumps and bandings. It is a thickness of 42 m.


Lithology Pattern: 
Aus conglomerate


Relationships and Distribution

Lower contact

The basal part of the Luotuopan Formation rests disconformably on the underlying Puyu Fm

Upper contact

The top part is conformably overlain by the Heyao Fm (Hejiayao Fm).

Regional extent

Central Henan-Hubei border region. The Luotuopan Formation is mainly exposed in the north slope of Yuzhai Mt. to Songshan Mt., from Foguangyu of Yanshi County on the west, eastward to Shaolin Temple of Dengfeng County, then to Wuzhi Mt. area in the juncture of Dengfeng, Mixian and Gongyi counties.


GeoJSON

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Fossils


Age 

Middle Qingbaikousan (middle Tonian) on schematic stratigraphic section.

Age Span: 

    Beginning stage: 
Tonian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
944.00

    Ending stage: 
Tonian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
860.00

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.