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
Pintaboluo Formation
Click to display on map of the Ancient World at:
Pintaboluo Fm base reconstruction

Pintaboluo Fm

Period: 
Cretaceous

Age Interval: 
Late Cretaceous, (7b) K2pt


Province: 
Xizang (Tibet)

Type Locality and Naming

The Pintaboluo Formation was erected by Wang Naiwen in 1983. The section for the designation is in Guiya of the Baingoin County of Xizang (89°36′E; 31°50′N). The reference section is in Popoyala of the Baingoin County of Xizang (89°50′E; 31°45′N).


Lithology and Thickness

The Pintaboluo Formation is represented by gray medium-bedded clayey fine-grained oolitic limestone and clayey limestone interbedded with marl and quartz fine sandstone, locally with moderately basic volcanic rocks. It is 200 m thick.


Lithology Pattern: 
Oolitic limestone


Relationships and Distribution

Lower contact

Its base is in conformable contact with limestone, mudstone, sandstone and siliceous rocks of the Popoyala Fm (Boboyagla Fm).

Upper contact

Unknown nature of contact to the overlying Hongyashan Fm.

Regional extent

The present formation is only seen in the Guiya and Popoyala areas of the Baingoin County, Xizang. It is persistent in lithology.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[79.53,33.004],[80.44,32.883],[81.37,32.762],[81.996,32.506],[82.451,32.258],[82.586,32.052],[82.479,31.966],[82.287,31.888],[81.989,31.853],[81.676,31.902],[81.264,32.037],[80.745,32.101],[79.921,32.307],[79.331,32.393],[78.969,32.513],[78.762,32.727],[78.798,32.961],[79.118,33.054],[79.53,33.004]]]]}}

Fossils

In the Guiya and Popoyala areas, it yields foraminifera Lenticulina sp., Vidalina sp., Textularia sp.; and calcareous algae Acicularia americana, A. autique, etc.


Age 


Age Span: 

    Beginning stage: 
Coniacian

    Fraction up in beginning stage: 
0.25

    Beginning date (Ma): 
88.47

    Ending stage: 
Santonian

    Fraction up in the ending stage: 
0.75

    Ending date (Ma):  
84.16

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao