59 research outputs found

    Middle Permian Ostracods from Tak Fa Limestone, Phetchabun Province, Central Thailand

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    This paper presents the first Permian ostracod fauna discovered in Thailand. The ostracods are recovered from the Tak Fa Limestone (Middle Permian) in Phetchabun province, central Thailand. The ostracods belong to eight genera and 15 species. Four species are newly described: Sargentina phetchabunensis nov. sp., Geffenina bungsamphanensis nov. sp., Reviya subsompongensis nov. sp. and Bairdia takfaensis nov. sp. The ostracod assemblages characterize a shallow marine, near shore environment at the time of deposition. Except for one species, which shows palaeobiogeographical links between Central Thailand and South China, all the other species are endemic

    A Late Pleistocene palynoflora from the coastal area of Songkhla Lake, southern Thailand.

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    A sediment sample dating from the Late Pleistocene from Ban Bo So, Singha Nakhon district, Songkhla province, in the Sathingpra Peninsula of southern Thailand was extracted for palynological study. The predominance of mangrove palynomorphs, which are from various families including Rhizophoraceae, Sonneratiaceae, and Avicenniaceae, infers a marine deposit in a tidal environment. Other pollen is representative of tropical plants in back mangrove forest, beach forest, swamp, and lowland-montane forest. The presence of a mangrove community is indicative of a high sea level whereas inland pollen types suggest a tropical vegetation

    Contributions to the paleozoic evolution of northern Thailand

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    āļœāļĨāļ‡āļēāļ™āļ§āļīāļŠāļēāļāļēāļĢāļ„āļ“āļēāļˆāļēāļĢāļĒāđŒāļĄāļŦāļēāļ§āļīāļ—āļĒāļēāļĨāļąāļĒāđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩāļŠāļļāļĢāļ™āļēāļĢ

    Corelation of the triassic stratigraphy between Simao and Lampang-phrae basins: implicaions for the tectonopaleography of southeast asia

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    The saraburi of triassic stratigraphy of thailand and Its implication for geotectonic evolution

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    āļœāļĨāļ‡āļēāļ™āļ§āļīāļŠāļēāļāļēāļĢāļ„āļ“āļēāļˆāļēāļĢāļĒāđŒāļĄāļŦāļēāļ§āļīāļ—āļĒāļēāļĨāļąāļĒāđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩāļŠāļļāļĢāļ™āļēāļĢ

    Geodynamic evolution of Loei area - northeastern Thailand

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    āļœāļĨāļ‡āļēāļ™āļ§āļīāļŠāļēāļāļēāļĢāļ„āļ“āļēāļˆāļēāļĢāļĒāđŒāļĄāļŦāļēāļ§āļīāļ—āļĒāļēāļĨāļąāļĒāđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩāļŠāļļāļĢāļ™āļēāļĢāļĩThe discovery of the chromian spinel detritus in sandstones from the Permian Nam Duk Formation (Phetchabun region) confirms that the siliciclastic part of this formation is related to the erosion of a mountain belt caused by compressional deformation. The question discussed is whether this detritus is derived from an older orogen exposed today in the region of Loei east of the Nam Duk Basin, or it is from a mountain belt which evolved during Permian times in the west (Nan-Uttaradit region). In the first case the Nam Duk Formation would represent the passive continental margin sequence of the “Indochina craton”, and in the second case it would be part of the sedimentary wedge associated with the compressional deformation and subsequent uplift to the erosional level during Middle to Upper Permian of a rising mountain belt further in the west. In this contribution, arguments in favour of the second scenario are discussed. The region close to the Nan-Uttaradit suture zone shows evidence of compressional deformation and subsequent uplift to an erosional level in the Permian when the chromian spinel detritus was deposited in the Nam Duk Formation

    Middle triassic radiolarian fauna from Lamphun,Northern Thailand

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    āļœāļĨāļ‡āļēāļ™āļ§āļīāļŠāļēāļāļēāļĢāļ„āļ“āļēāļˆāļēāļĢāļĒāđŒāļĄāļŦāļēāļ§āļīāļ—āļĒāļēāļĨāļąāļĒāđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩāļŠāļļāļĢāļ™āļēāļĢ

    Tracing disrupted out margin of paleoeurasian continent through union of Myanmar

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    āļœāļĨāļ‡āļēāļ™āļ§āļīāļŠāļēāļāļēāļĢāļ„āļ“āļēāļˆāļēāļĢāļĒāđŒāļĄāļŦāļēāļ§āļīāļ—āļĒāļēāļĨāļąāļĒāđ€āļ—āļ„āđ‚āļ™āđ‚āļĨāļĒāļĩāļŠāļļāļĢāļ™āļēāļĢ
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