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

Tilin Fm

Period: 
Paleogene

Age Interval: 
Early Eocene


Province: 
Myanmar Central Basins

Type Locality and Naming

Chindwin Basin, In the road section, between 75 and 81 milestone, on the Pakokku-Tilin road, the horizon, where Cotter and first described in 1913-14 is well marked. In Minbu-Salin Basin, Tilin area. [Original Publication: Barber, A. J., Khin Zaw & Crow, M. J. (eds) 2017. Myanmar: Geology, Resources and Tectonics. Geological Society, London, Memoirs, 48, 219–260]

Synonym: Tilin Sandstones

[Figure: Map showing location of sub-basins of the Central Myanmar Basin (after Myint Thein and M. Maung 2017)]


Lithology and Thickness

Sandstone. Consists mainly of sandstones, grey-green, moderately hard, fine- to coarse-grained, intercalated with silty clay beds. The Tilin Sandstones show considerable variation in lithology and thick and cannot everywhere be differentiated. Thickness is 3000 m. In Minbu-Salin Basin and Pyay Embayment, Clayey sandstone. This Fm contains sandstones, interbedded with carbonaceous shale beds. The sandstones are light yellow-brown to light grey, thinly bedded, fine- to medium-grained, fairly sorted, composed of quartz, feldspar, mica and carbonaceous materials. Shales are bluegrey, moderately hard, thinly laminated, slightly micaceous and fairly carbonaceous.

[Figure: Stratigraphic succession of the Chindwin Basin (after Than Htut, 2017)]


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Conformable with Laungshe Fm

Upper contact

Conformable with Tabyin Fm

Regional extent

This Fm is developed in Chindwin Basin, Minbu-Salin Basin and Pyay Embayment.

[Figure: a) Composite stratigraphic correlation of Myanmar Central Basins (after Than et al., 2017)]


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[97.36,26.84],[95.62,26.11],[94.83,24.64],[94.19,22.39],[94.3,20.38],[95.11,17.51],[96.41,17.81],[95.95,20.52],[95.51,22.18],[96.28,24.52],[96.96,24.26],[97.82,25.42],[97.36,26.84]]]]}}

Fossils

In Minbu-Salin Basin and Pyay Embayment, contains few fossils, but some burrowing structures are recorded.


Age 

Early Eocene

Age Span: 

    Beginning stage: 
Ypresian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
56.00

    Ending stage: 
Ypresian

    Fraction up in the ending stage: 
0.2

    Ending date (Ma):  
54.41

Depositional setting

Deposited under nearshore marine conditions in Chindwin Basin, deposited under outer shoreface to abyssal conditions in Minbu-Salin Basin and Pyay Embayment.


Depositional pattern:  


Additional Information


Compiler:  

Than Htut, Kapesa Lokho, D.S.N.Raju and Ravi Misra (Than Htut, Myanmar petroleum systems, including the offshore area, Chapter 11 in Barber, A. J., Khin Zaw & Crow, M. J. (eds) 2017. Myanmar: Geology, Resources and Tectonics. Geological Society, London, Memoirs, 48, 219–260)