Biostratigraphy and palaeobiogeography of Lower Permian (lower Kungurian) conodonts from the Tak Fa Formation (Saraburi Limestone), Thailand |
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| Authors: | I. Metcalfe M. Sone |
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| Affiliation: | 1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;2. Department of Geological Sciences, Texas Christian University, Fort Worth, TX 76129, USA;3. Jiangsu Province Surveying and Mapping Engineering Institute, Nanjing 210013, China;4. Department of Geosciences, University of Arkansas, Fayetteville, AR 72701, USA;1. Institute of Earth Sciences, University of Graz, Nawi Graz, Heinrichstraße 26, 8010 Graz, Austria;2. Geological Survey of Slovenia, Dimi?eva ulica 14, SI-1000 Ljubljana, Slovenia;3. University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering, Pierottijeva 6, 10 000 Zagreb, Croatia |
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| Abstract: | Lower Permian (lower Kungurian) conodonts are reported from the Indochina Block of Southeast Asia. The fauna from the Tak Fa Formation of the Saraburi Limestone Group exposed in limestone hills NNW of Khok Samrong, Thailand, includes Sweetognathus subsymmetricus Wang, Ritter and Clark (early forms) and Pseudosweetognathus costatus Wang, Ritter and Clark. The co-occurrence of these species indicates a Lower Permian age (upper half of the lower Kungurian) for the sampled limestones representative of the Mesogondolella siciliensis–S. subsymmetricus Zone of South China. Sweetognathus and Pseudosweetognathus are for the first time reported from the Indochina terrane located in the palaeoequatorial belt in the Kungurian. Pseudosweetognathus appears restricted to the Kungurian of the South China and Indochina terranes thus supporting palaeogeographic reconstructions that isolate these terranes within the Palaeo-Tethys during the Kungurian. |
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