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Myetye Formation
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Myetye Fm base reconstruction

Myetye Fm

Period: 
Cambrian

Age Interval: 
Late Cambrian


Province: 
Myanmar Shan Region

Type Locality and Naming

Shan South Plateau, it is found at Molohein and also in the Ashemyin- Anaukmyin range, Hsinmango hill, Satthe village in Ye-ngan and Lawksawk townships and NW of Panzit, Pindaya township, north of Heho, Hethin Hill, Kalaw township and Méné Taung, Hopong township. The Myetye Fm (Myint Lwin Thein in IGCP, Burmese National Committee 1977) is named after Myetye 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 Myetye Fm consists of thin-to-medium-bedded pinkish, purplish, reddish-brown, buff ferruginous, micaceous sandstone with subordinate orthoquartzite, subgreywacke, gritty sandstone, phyllite, dolomite and limestone. It is 392 m thick.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

It rests conformably on the Pandung Fm

Upper contact

It underlies the Early Ordovician Lokepyin Fm

Regional extent

The Myetye Fm is correlated with the Taunggyun Sandstone of the Ngwetaung Group in the Pyin Oo Lwin township, the Machinchang Fm of the Langkawi Islands and mainland Peninsular Malaysia (Cocks et al. 2005; Lee 2009), and the Tarutao Group of Tarutao

Island, Thailand (Wongwanich et al. 2002; Ridd 2011).


GeoJSON

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Fossils

Myint Lwin Thein (1973) listed the saukiid trilobites of the Myetye Fm, including Saukiella junia Winston & Nicols, Saukiella sp. A, Eosaukiella buravasi Kobayashi and Drumapsis texana Resser.


Age 

Myint Lwin Thein (1973) suggested a Late Cambrian (Furongian) age; however, that material was not illustrated and may represent different saukiid genera (N. F. Hughes pers. comm. 2014).[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: 
Paibian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
497.00

    Ending stage: 
Cambrian Stage 10

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
486.85

Depositional setting

The depositional environment of the Myetye Fm was a shallow-marine, nearshore or beach environment, as indicated by the abundant fossil fragments which are mainly the cephala and pygidia of trilobites.


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).