Abstract
Well-preserved Permian radiolarians have been discovered from chert blocks embedded in a unit in the Pai district, Mae Hong Son province, northwestern Thailand that was recently mapped as Carboniferous. Twenty-four taxa belonging to ten genera have been recognized and some significant forms of Follicucullus are present. Two upper Maokouan (Capitanian) to lower Wuchiapingian radiolarian assemblages (Follicucullus monacanthus, Follicucullus charveti - F. porrectus assemblages) are reported. Follicucullus charveti Caridroit & De Wever is interpreted as a possible provincialism rather than being endemic like other members of the same genus. These results provide more data to demonstrate that in northern Thailand, the Devonian to Triassic was of a zone of deep siliceous marine sedimentation. The resultant deposits are one of the longest witnesses of continuous deposition in an oceanic setting.
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Wonganan, N., Caridroit, M. (2007). Middle to Upper Permian radiolarian faunas from chert blocks in Pai area, northwestern Thailand. In: Baumgartner, P.O., Aitchison, J.C., De Wever, P., Jackett, SJ. (eds) Radiolaria. Eclogae Geologicae Helvetiae Supplement, vol 2. Birkhäuser, Basel. https://doi.org/10.1007/978-3-7643-8344-2_10
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