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Pandung Formation
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Pandung Fm base reconstruction

Pandung Fm

Period: 
Cambrian

Age Interval: 
Middle Cambrian


Province: 
Myanmar Shan Region

Type Locality and Naming

Shan South Plateau, it is widely distributed in Shan State South as in Lawksawk township, Molohein and the Ashemyin–Anaukmyin ranges, in Ye-ngan township, Padongaing and Satthe, base of Hsinmango Hill, in Pindaya township, NW of Panzit, west of Kyankhinpyaung, Shwepahto area and in Hopong township in the Méné Taung range. Myint Lwin Thein (in Burmese National Committee, IGCP 1977) first named this unit after Pandung Hill (1869 m) in Ye-ngan township, Shan State South. [Original Publication: Barber, A. J., Khin Zaw & Crow, M. J. (eds) 2017. Myanmar: Geology, Resources and Tectonics. Geological Society, London, Memoirs, 48, 317-342]


Lithology and Thickness

Sandstone. The Pandung Fm consists of thin- to medium-bedded purplish, buff, white, pinkish orthoquartzite with minor amounts of whitish, tuffaceous sandstone with no fossils. The type section is 392 m thick.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

It unconformably overlies the Chaung Magyi Gr of Precambrian age.

Upper contact

It underlies the Myetye Fm

Regional extent

It is correlated with the Sibaing Orthoquartzite Fm of Patheingyi township, Mandalay region and the lower part of the Pangyun Fm in Shan State North.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[96.98,20.93],[96.61,20.82],[96.56,20.51],[97.14,19.94],[97.8,19.82],[98.26,20.01],[98.66,20.28],[98.18,20.74],[97.54,21.03],[96.98,20.93]]]]}}

Fossils

No fossil evidence.


Age 

Middle Cambrian.[Figure: Stratigraphical correlation of the Cambrian–Devonian rocks of Myanmar Shan region with those of northern Thailand and NW Malaysia. Asterisks indicate the levels at which fossils useful in correlation were found (after Aung&Cocks, 2017)]

Age Span: 

    Beginning stage: 
Wuliuan

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
509.00

    Ending stage: 
Guzhangian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
497.00

Depositional setting

As for the Sibaing Orthoquartzite Fm, the orthoquartzites of the Fm represents a shallow marine, barrier beach environment.


Depositional pattern:  


Additional Information


Compiler:  

Aye Ko Aung and L. Robin M. Cocks (Aung & Cocks, Cambrian–Devonian stratigraphy of the Shan Plateau, Myanmar (Burma), Chapter 14 in Barber, A. J., Khin Zaw & Crow, M. J. (eds) 2017. Myanmar: Geology, Resources and Tectonics. Geological Society, London, Memoirs, 48, 317-342).