Home Multi-Country Search About Admin Login
Cenozoic
Mesozoic
Paleozoic
Neoproterozoic
Mesoproterozoic
Paleoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Moza Formation
Click to display on map of the Ancient World at:
Moza Fm base reconstruction

Moza Fm

Period: 
Neogene

Age Interval: 
Early Middle Miocene


Province: 
Myanmar Central Basins

Type Locality and Naming

Pegu (Bago) Yoma-Sittaung Basin, [Original Publication: Barber, A. J., Khin Zaw & Crow, M. J. (eds) 2017. Myanmar: Geology, Resources and Tectonics. Geological Society, London, Memoirs, 48, 169-183]

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


Lithology and Thickness

Sandstone. A 1200 m thick and is an interbedded unit of sandstone and shale with frequent fossiliferous lenses of pelecypods, coral fragments and mud clasts. The presence of packages of thin sandstone beds with various types of ripple marks is conspicuous.

[Figure: (b) Moza Formation in a road-cut at mile post 310/5, east side of Yangon–Mandalay Expressway. (c) Laterally persistent shales and sandstone beds of the Moza Formation, road-cut at mile post 309/5 west side of Expressway. (d) Alternating uniform beds of sandstone (with flaser bedding) and shale in the Moza Formation, mile post 306/3 west side of Expressway (after Myint Thein and M. Maung 2017)]

[Figure: (a) Flaser bedding in the Moza Formation, mile post 306/3, west side of Yangon–Mandalay Expressway. (b) Cross-bedded fining-upwards sandstone with flaser bedding and shale, Moza Formation, mile post 304/7, west side of Expressway (after Myint Thein and M. Maung 2017)]

[Figure: (e, f) Convolute laminations, Moza Formation, mile post 251/7, east side of Expressway (after Myint Thein and M. Maung 2017)]


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

Conformable with Taungtalone Sandstone Fm

Upper contact

Conformable with Khabo Sandstone Fm

[Figure: (b)regressive sequence boundary (RSB) between the sand-bar facies of the Khabo Sandstone Fm (Upper Miocene) and mixed-flat (tidal-flat) facies of Moza Formation (Lower–Middle Miocene) (after Than et al., 2017)]

Regional extent

This Fm is developed in Pegu (Bago) Yoma-Sittaung Basin (BYSB)

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

[Figure: b) Stratigraphic correlation of Bago (Pegu) Yoma-Sittaung Basin (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

Trace fossils of the Cruziana (Cruziana, Aulichnites, Planolites, Astericites) and Skolithos ichnofacies (Skolithos, Ophiomorpha, Diplocraterium) and rare ‘sand balls’ generated by sand crabs are observed.

[Figure: (a) Cruziana sp. at 306/2 mile post, east side of Yangon–Mandalay Expressway. (c) Skolithos sp. seen on the bedding plane at 262/7 mile post, west side of Expressway (after Myint Thein and M. Maung 2017)]


Age 

Early Middle Miocene

Age Span: 

    Beginning stage: 
Langhian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
15.99

    Ending stage: 
Langhian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
13.82

Depositional setting

Middle shoreface to offshore environments


Depositional pattern:  


Additional Information


Compiler:  

Myint Thein and Maung Maung (Myint Thein and Maung Maung The Eastern (Back-arc) Basin of Central Myanmar: Basement rocks, lithostratigraphic units, palaeocurrents, provenance and developmental history, Chapter 8 in Barber, A. J., Khin Zaw & Crow, M. J. (eds) 2017. Myanmar: Geology, Resources and Tectonics. Geological Society, London, Memoirs, 48, 169-183)