Outline of the Geological Evolution of Malaya

Burton, C. K.

doi:10.1086/627733

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…In the southern part of the Malaysian border state of Kedah, the Upper Ordovician to Lower/Middle Devonian Mahang Formation (equivalent to the Bannang Sata group) is succeeded, with little or no unconformity, by the Kampong Sena formation (Burton 1967a(Burton , 1972. Young andJantananipa (1970) earlier mentioned the equivalence of part of the Phuket • with this rock unit (which they termed "Pokok Sena beds", following an error introduced by Jones et al, 1966).…”

Section: Correlations Of the Phuket Groupmentioning

confidence: 99%

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The Kanchanaburi supergroup of Peninsular and Western Thailand

Burton¹,

Bp²

1986

BGSM

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A dominantly clastic succession separates the Ordovician-Silurian/Devonian Thung Song Limestone from the Pennian Rat Burl limestone in peninsular and wesiem Thailand. The stratigraphic organization, nomenclature, correlation and palaeogeography of these mid-Palaeozoic strata have been the subject of considerable misunderstanding and dispute.Confusion began with the misconception (Brown eta/., 1951) that part of this sequence (the "Phuket series") was of Cambrian age and therefore distinct from strata shown to be Silurian to Carboniferous (the "Kanchanaburi series"). Although this error was clarified by subsequent fossil discoveries (Baum and Koch, 1968;Young and Jantaranipa, 1970), attempts to order the stratigraphy from limited areas and failure to realise that the top of the sequence is diachronous have resulted in various overlapping,• irreconcilable and internally inconsistent interpretations.An attempt is made here to resolve the stratigraphic organization of these rocks in terms of the American Code of Stratigraphic Nomenclature, although it is not yet possible to formalize all the rock units irivolved.•The precedence accorded by Baum and Koch (1968) to the name Kanchanaburi is followed here as is the assignment of group status to the Phuket by Mitchell eta/. (1970). The tentaculite-bearing shales of the original"Kanchanaburi series" are placed in the new Bannang Sata Group and the Kanchanaburi therefore assumes supergroup rank to embrace these two rock units. Whilst further work needs to be done to establish the component formations of the (Silurian-Middle Devonian) Bannang Sata, the Phuket Group is here subdivided into the Khlong Kaphon formation (Middle Devonian -Lower Carboniferous) below and the Pathiu formation (Lower Carboniferous to Lower Permian) above.The Kanchanaburi supergroup is thought to constitute a continental margin sequence, probably generated on the flanks of Gondwanaland and behind a volcanic arc. In part the Bannang Sata group is of restricted basin (euxinic) facies. The Khlong Kaphon formation is largely comprised of a distinctive, and much-discussed, pebbly mudstone, diamictite or tilloid plus greywacke. Whilst also including mudstone and greywacke, more mature arenite is the dominant component of the Pathiu formation, possibly indicative of another source area and certainly pointing to shallowing of the basin of deposition. The Pathiu may, however, be absent, in part or in entirety due either to non-deposition and/or erosion prior to the major Permian transgression.The origin of the Phuket group is deliberated upon and, following the hypotheses of Ridd (1971a) and Asnachinda (1978), it is thought that the bulk of this rock unit was deposited in a graben formed as a continental fragment ("Shan-Thai") rifted away from Gondwanaland. Despite increasing suggestions that the Phuket is glaciogenic, in part or in whole, no unequivocal contribution from glacial sources is evident.

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Section: Correlations Of the Phuket Groupmentioning

confidence: 99%

“…Here it is represented (fig. 4) in part by the Mahang Fonnation (Burton 1967a) and principally by the Baling group (Burton 1970b(Burton , 1972. The Mahang is of euxinic facies.…”

Section: Palaeogeographymentioning

confidence: 99%