Home Multi-Country Search About Admin Login
Cenozoic
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Early Paleozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Mergui Gr

Mergui Gr


Period: 
Paleogene, Neogene, Quaternary

Age Interval: 
Upper Oligocene to Plio-Pleistocene (1,2)


Province: 
Andaman Sea: Mergui Basin

Type Locality and Naming

Mergui Basin, Andaman Sea (Polachan, 1988; Polachan and Racey, 1994).

Synonym: กลุม่หินเมอร์กยุ

[Figure 1: Map of the Mergui Basin showing the main structural features including basin depocentres, based on an extensive grid of 2D seismic reflection data. (From C K Morley & A Racey, 2011)]


Lithology and Thickness

Sandstones, conglomerates, siltstones, mudstones, limestones. Consists of 9 formations: Ranong Fm, Yala Fm, Payang Fm, Tai Fm, Kantang Fm, Surin Fm, Trang Fm, Thalang Fm and Takua Pa Fm. [See individual formations for details.]

[Figure 2: Stratigraphy and cross-section through the Mergui Basin, Andaman Sea, based on data in Polachan & Racey (1994) and Andreason et al. (1997). (a) Oligocene–Recent stratigraphy of the Mergui Basin; (b) stratigraphy of the syn-rift section (Oligocene–early Miocene) schematically illustrating the east–west variation in stratigraphy across the basin and the effect of rift-basin highs (e.g. Central High horst block) on large-scale distribution of sedimentary facies, modified from Andreason et al. (1997); (c) east–west cross-section through the Mergui Basin illustrating the typical half-graben geometries of the basin (modified from Polachan & Racey 1994). (From C K Morley & A Racey, 2011)]


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

uncertain

Upper contact

unnamed Quaternary

Regional extent

Mergui Basin, Andaman Sea


GeoJSON

null

Fossils


Age 

Upper Oligocene to Plio-Pleistocene

Age Span: 

    Beginning stage: 
Chattian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
28.09

    Ending stage: 
Holocene

    Fraction up in the ending stage: 
0.0

    Ending date (Ma):  
0.01

Depositional setting

Non-marine depositional environment to deep marine shale and submarine fan turbidites


Depositional pattern:  


Additional Information


Compiler:  

Wen Du - modified from- C. K. Morley & A. Racey, 2011, Chapter 10 Tertiary in Ridd, M.F., Barber, A.J., and Grow, M.J., editors, The Geology of Thailand, Geol. Soc. of London.;Lexicon of Stratigraphic Names of Thailand of 2013.