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Pattani Sequence V Formation

Pattani Sequence V Fm

Period:

Neogene

Age Interval:

Late Miocene-Recent (7)

Province:
Gulf of Thailand

Type Locality and Naming

Pattani Basin (central Gulf of Thailand). Uppermost of the 5 sequences.

Synonym:

[Figure: Map showing the Tertiary basins of Thailand. The solid black lines onshore are the principal rivers draining Northern and Central Thailand and the Khorat Plateau (Morley C. K. &Racey A., 2011, page 224).]

Lithology and Thickness

"The predominant lithologies are unconsolidated claystones, thin sandstones and coals. Coals are low-grade lignites." (Morley and Racey, 2011)

Lithology Pattern:

Sandy claystone

Relationships and Distribution

Lower contact

The base of Sequence V is unconformable on Pattani Sequence IV Fm on seismic reflection data.

Upper contact

Seawater

Regional extent

Pattani Basin (central Gulf of Thailand); but the succession is similar to adjacent basins (Fig. 10.16 in Morley and Racey, 2011)

GeoJSON

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Fossils

Age

Late Miocene-Recent

Age Span:

Beginning stage:

Tortonian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

11.63

Ending stage:

Holocene

Fraction up in the ending stage:

0.0

Ending date (Ma):

0.01

Depositional setting

The Upper Miocene marks the onset of transgressive marginal marine deposition.

Depositional pattern:

Additional Information

Compiler:

Wen Du - 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 Lexicon of Stratigraphic Names of Thailand of 2013.