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Luoding Formation
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Luoding Fm base reconstruction

Luoding Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous, K1ld, (42e)


Province: 
Guangdong

Type Locality and Naming

The name of Luoding Formation was given by the No 763 Geological Team of Guangdong in 1962. The type locality is the Baimakeng area of Luoding. Type section is the Baimakeng section of Luoding, Guangdong (111º31', 22º49').


Lithology and Thickness

The Luoding Formation is a group of red clastic rocks. Lower part consists of brownish red feldspar quartz sandstone intercalated with conglomerate, silty mudstone. Upper part is feldspar quartz sandstone, calcareous siltstone and sandstone. It is 871 to 2916 m in thickness.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

The Luoding Formation is overlying the Paleozoic strata unconformably.

Upper contact

The Luoding Formation underlies the Sanya Fm (Sanyajiang Fm) unconformably.

Regional extent

It is distributed in the Luoding, Qingshui and Tangcun areas.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[110.88,22.09],[110.95,22.11],[110.97,22.08],[110.95,22],[111.03,21.82],[111.09,21.77],[111.16,21.8],[111.18,21.78],[111.07,21.59],[110.9,21.46],[110.75,21.38],[110.64,21.42],[110.58,21.53],[110.64,21.68],[110.66,21.7],[110.78,21.84],[110.88,22.09]]]]}}

Fossils

The Formation yields bivalves Trigonioides kodairai and conchostracans, ostracod fossils.


Age 

Not given; put as late-Early Cret for graphic purposes.

Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
121.40

    Ending stage: 
Albian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
100.50

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao