Saraburi Gr

Cenozoic

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Early Paleozoic

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Saraburi Gr

Period:

Carboniferous, Permian

Age Interval:

Late Carboniferous to Late Permian (13,15)

Province:
Indochina Block: Loei Fold Belt, Indochina Block: Khorat Plateau,

Type Locality and Naming

Saraburi province.

Successions (upward; generalized): (1) Khorat Plateau = Si That Fm, Nam Duk Fm, Pha Nok Khao Fm, Hua Na Kham Fm; (2) Loei-Phetchabun Range (Saraburi region of southern part) = Phu Phe Fm (and coeval Tak Fa Fm), coeval Khao Khwang Fm, Khao Khad Fm, Pang Asok Fm and Nong Pong Fm, Sap Bon Fm; (3) Loei-Phetchabun Range (Loei region of northern part) = Wang Saphung Fm, Nam Mahoran Fm (and coeval Huai Som Fm), E-Lert Fm (and upper part is coeval with Pha Nok Khao Fm), Pha Dua Fm (and coeval Hua Na Kham Fm).

[Figure: Geological map of Saraburi Group in Saraburi area, NE Thailand (Ueno and Charoentitirat, 2011).]

Synonym: กลุม่หินสระบุร

Lithology and Thickness

Carbonate platforms (massive to well bedded limestone, fossiliferous and reef), shale, sandstone and thin-bedded limestone. See individual formations. Thickness: 4,486 m.

[Figure: Carboniferous and Permian facies distribution and resultant stratigraphic subdivisions on the western margin of the Indochina Block, with Saraburi Group highlighted (Ueno and Charoentitirat, 2011).]

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

Loei region of northern part = underlain by Wang Saphung Fm (Unconformable? – or in Khorat Plateau region is a Mid-Carboniferous Unconformity based on seismic mapping.)

Upper contact

Major unconformity (Indosinian I Event), overlain by Huai Hin Lat Fm of late Triassic, then Khorat Gr

Regional extent

Loei-Phetchabun Ranges and northwest of the Khorat Plateau. Assumed to underly the Khorat Plateau, based on Booth, J. & Sattayarak N., 2011, Chapter 9 Subsurface Carboniferous-Cretaceous geology of NE Thailand in Ridd, M.F., Barber, A.J., and Grow, M.J., editors, The Geology of Thailand, Geol. Soc. of London.

[Figure: Distribution of Carboniferous and Permian in NE Thailand. Data mainly based on 1:1 million scale geological map of Thailand (DMR 1999) with minor modiﬁcations (Ueno and Charoentitirat 2011).] [Geo-JSON omitted here to avoid overlap with component formations.]

GeoJSON

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Fossils

Age

Late Carboniferous to Late Permian

Age Span:

Beginning stage:

Moscovian

Fraction up in beginning stage:

Beginning date (Ma):

314.60

Ending stage:

Induan

Fraction up in the ending stage:

Ending date (Ma):

251.90

Depositional setting

Marine shelf environment, near-reef environment

[Figure: Late Paleozoic major facies subdivisions on the western margin of the Indochina Block by Ueno and Charoentitirat (2011). (Slightly modiﬁed from Wielchowsky & Young 1985).]

Depositional pattern:

Additional Information

Subdivisions vary among authors and regions:

Six formal formations (Hinthong and others, 1985): Phu Phe Fm, Khao Khwang Fm, Nong Pong Fm, Pang Asok Fm, Khao Khad Fm and Sap Bon Fm;

Two formations by Nakornsri (1977): Khao Luak Fm and Tak Fa Fm;

Three formations by Chonglakmani and Sattayarak (1984): Pha Nok Khao Fm, Nam Duk Fm and Hua Na Kham Fm;

Three formations by Charoenprawat and others (1984): Nam Mahoran Fm, ELert Fm, and Pha Dua Fm.

Compiler:

Wen Du -modified from Ueno K. & Charoentitirat T., 2011, Chapter 5 Carboniferous and Permian 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