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Mae Pa Formation

Mae Pa Fm

Period:

Neogene

Age Interval:

Early Miocene (5)

Province:
Sibumasu: Western Region

Type Locality and Naming

Mat Sot Basin; Mae Sot district, Tak province. This basin lies on the Myanmar border and is bounded on its north by the Mae Ping Fault. Mae Pa Fm is the upper-middle unit in the Ma Sot Gr..

Synonym: หมวดหินแม่ปะ

Lithology and Thickness

Stratigraphy at Mae Tun coalfield at Mae Ramat in the northern part of the basin. "Ratanasthien (1990) describes the … Mae Pa Formation is over 1300 m thick and is composed of mudstone, marl, limestone and shale." (Morley & Racey, 2011). dominant chemical precipitated in the upper part and barrier, channel, beach sands in the lower part.

Lithology Pattern:

Continental marl

Relationships and Distribution

Lower contact

Overlies onto the Mae Ramat Fm (lower part of Upper Oligocene-Lower Miocene strata)

Upper contact

Overlain by the Mae Sot Fm of late-Early Miocene age.

Regional extent

Mat Sot Basin on the Myanmar border and is bounded on its north by the Mae Ping Fault.

GeoJSON

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Fossils

Age

Implied to be early-Early Miocene (upper part of the Upper Oligocene–Lower Miocene interval; overlain by late-Early Miocene))

Age Span:

Beginning stage:

Aquitanian

Fraction up in beginning stage:

0.6

Beginning date (Ma):

21.49

Ending stage:

Burdigalian

Fraction up in the ending stage:

0.0

Ending date (Ma):

20.45

Depositional setting

Lacustrine to marginal lacustrine.

Depositional pattern:

Additional Information

Compiler:

Modified from Christopher K. Morley & Andrew Racey, 2011, Chapter 10 Tertiary stratigraphy in: Ridd, M.F., Barber, A.J., and Grow, M.J., editors, The Geology of Thailand, Geol. Soc. of London. And modified from- Lexicon of Stratigraphic Names of Thailand of 2013