Kyaukkok Fm
Type Locality and Naming
Minbu-Salin Basin, Kyaukkok village area in Minbu Township. [Original Publication: Barber, A. J., Khin Zaw & Crow, M. J. (eds) 2017. Myanmar: Geology, Resources and Tectonics. Geological Society, London, Memoirs, 48, 219–260]
[Figure: Map showing location of sub-basins of the Central Myanmar Basin (after Myint Thein and M. Maung 2017)]
Lithology and Thickness
Sandy claystone. This Fm is composed mainly of sandstones, interbedded with brown shale beds. The sandstones are light grey to olive-grey, hard, bedded to thickly bedded, medium- to coarse-grained, fairly well-sorted, composed of quartz, feldspar, mica and lithic clasts set in a silty matrix. Mudstones are greenish-grey to olive-grey, soft, laminated, micaceous, carbonaceous and fossiliferous. A thickness of c. 1200 m (4000 ft) was recorded in the Kyaukkok village area in Minbu Township, with sand 70% and shale 30%. In Pyay Embayment, thickness ranges from 390 to 1250 m.
Relationships and Distribution
Lower contact
Conformable with Pyawbwe Fm
Upper contact
Conformable with Obogon Fm
GeoJSON
Fossils
Contains the microfossils Globorotalia fohsi barisanensis, G. peropheronda, Globigerinoides sicanus, Orbulina universa and Ammonia koeboensis.
Age
Depositional setting
This Fm was deposited under lagoonal to upper shoreface environments.
Additional Information