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	<journal>
		<journal_title>Climate of the Past</journal_title>
		<journal_url>www.clim-past.net</journal_url>
		<issn>1814-9324</issn>
		<eissn>1814-9332</eissn>
		<volume_number>6</volume_number>
		<issue_number>4</issue_number>
		<publication_year>2010</publication_year>
	</journal>
	<doi>10.5194/cp-6-461-2010</doi>
	<article_url>http://www.clim-past.net/6/461/2010/</article_url>
	<abstract_html>http://www.clim-past.net/6/461/2010/cp-6-461-2010.html</abstract_html>
	<fulltext_pdf>http://www.clim-past.net/6/461/2010/cp-6-461-2010.pdf</fulltext_pdf>
	<start_page>461</start_page>
	<end_page>473</end_page>
	<publication_date>2010-07-23</publication_date>
	<article_title content_type="html">Mid-Tertiary paleoenvironments in Thailand: pollen evidence</article_title>
	<authors>
		<author numeration="1" affiliations="1,2">
			<name>P. Sepulchre</name>
			<email>pierre.sepulchre@lsce.ipsl.fr</email>
		</author>
		<author numeration="2" affiliations="5,6">
			<name>D. Jolly</name>
		</author>
		<author numeration="3" affiliations="3">
			<name>S. Ducrocq</name>
		</author>
		<author numeration="4" affiliations="4">
			<name>Y. Chaimanee</name>
		</author>
		<author numeration="5" affiliations="3">
			<name>J.-J. Jaeger</name>
		</author>
		<author numeration="6" affiliations="2">
			<name>A. Raillard</name>
		</author>
	</authors>
	<affiliations>
		<affiliation numeration="1" content_type="html">Laboratoire des Sciences du Climat et de l&apos;Environnement/Institut Pierre Simon Laplace, UMR 8212 CEA/CNRS/UVSQ, Orme des Merisiers, bât. 709, 91191 Gif-sur-Yvette cedex, France</affiliation>
		<affiliation numeration="2" content_type="html">Laboratory of Paleoenvironments, ISE-M, UMR 5554, Case 61, Université Montpellier II, 34095 Montpellier Cedex 05, France</affiliation>
		<affiliation numeration="3" content_type="html">Institut International de Paléoprimatologie, Paléontologie Humaine: Evolution et Paléoenvironnements, UMR 6046 CNRS, Université de Poitiers, 40 avenue du Recteur Pineau, 86022 Poitiers, France</affiliation>
		<affiliation numeration="4" content_type="html">Paleontology Section, Department of Mineral Resources, Rama VI Road, Bangkok 10400 Thailand</affiliation>
		<affiliation numeration="5" content_type="html">formerly at: Laboratory of Paleoenvironments, ISE-M, UMR 5554, Case 61, Université Montpellier II, 34095 Montpellier Cedex 05, France</affiliation>
		<affiliation numeration="6" content_type="html">deceased</affiliation>
	</affiliations>
	<abstract content_type="html">Only few well-dated records document the evolution of Southeast Asian
paleoenvironments during the Cenozoic. Here we analyse continental pollen
assemblages from Late Oligocene and Miocene fossil sites of Thailand. In
agreement with previous studies, palynoflora from the Oligocene suggests
warm temperate forested habitats at 24–26 Ma, whereas Middle Miocene
assemblages are made of thermophilous taxa. This change can be linked to the
major climate reorganization that brought warmer and wetter conditions over
Southeast Asia around 22 Ma. This study also provides the first submillional
records from the Middle Miocene of Thailand. Thirteen samples of lignite
layers from the sivaladapid-bearing Mae Moh site, dated between 13.3 and
13.1 Ma, and six samples from the hominoid-bearing Chiang Muan deposit,
dated between 12.4 and 12.2 Ma, document oscillations between tropical
woodlands and grasslands in northern Thailand. These pollen records likely
reflect climate variations linked to insolation variations. Late Miocene
palynological assemblages from Khorat, northeastern Thailand, document
fluviolacustrine paleoenvironments alternatively covered by thermophilous
trees and grasslands. These records show that both sivaladapids and early
hominoids from Thailand have evolved in tropical environments with high
variability in the vegetation cover.</abstract>
	<references>
		<reference numeration="1" content_type="text"> % vor jede Referenz Anshari, G., Kershaw, P., Van Der Kaars, S., and Jacobsen, G.: Environmental change and peatland forest dynamics in the Lake Sentarum area, West Kalimantan, Indonesia, J. Quaternary Sci., 19, 637–655, 2004. </reference>
		<reference numeration="2" content_type="text"> Badgley, C., Barry, J., Morgan, M., Nelson, S., Behrensmeyer, A., Cerling, T., and Pilbeam, D.: Ecological changes in Miocene mammalian record show impact of prolonged climatic forcing, P. Natl. Acad. Sci. USA, 105, 12145–12149, 2008. </reference>
		<reference numeration="3" content_type="text"> Benammi, M., Chaimanee, Y., Urrutia-Fucugauchi, J., and Jaeger, J. J.: Magnetostratigraphic Study of the Continental Sedimentary Sequence of the Chiang Muan Basin, Northern Thailand: Implications for the Age of the First Miocene Hominoids from Thailand, Int. Geol. Rev., 46, 646–654, 2004. </reference>
		<reference numeration="4" content_type="text"> Bennami, M., Urrutia-Fucugauchi, J., Alva-Valdivia, L. M., Chaimanee, Y., Triamwichanon, S., and Jaeger, J.-J.: Magnetostratigraphy of the Middle Miocene continental sedimentary sequences of the Mae Moh Basin in northern Thailand: evidence for counterclockwise block rotation, Earth. Planet. Sci. Lett., 204, 373–383, 2002. </reference>
		<reference numeration="5" content_type="text"> Blasco, F.: Montagnes du sud de l&apos;Inde: Forêts, savanes, écologie, in: Travaux de la Section Scientifique et Technique, Institut Français de Pondichéry, Pondicherry, 349–389, 1971. </reference>
		<reference numeration="6" content_type="text"> Bonnefille, R. and Riollet, G.: Pollens des savanes d&apos;Afrique orientale, Editions du Centre National de la Recherche Scientifique, Paris, 256~pp., 1980. </reference>
		<reference numeration="7" content_type="text"> Bonnefille, R., Potts, R., Chalie, F., Jolly, D., and Peyron O.: High-resolution vegetation and climate change associated with Pliocene Australopithecus afarensis, P. Natl. Acad. Sci. USA, 101, 12125–12129, 2004. </reference>
		<reference numeration="8" content_type="text"> Briais, A., Patriat, P., and Tapponnier, P.: Updated interpretation of magnetic anomalies and seafloor spreading stages in the South China Sea- Implications for the Tertiary tectonics of Southeast Asia, J. Geophys. Res. Solid Earth, 98, 6299–6328, 1993. </reference>
		<reference numeration="9" content_type="text"> Cerling, T. E., Quade, J., and Wang, Y.: Expansion and Emergence of C4 Plants, Nature, 371, 112–112, 1994. </reference>
		<reference numeration="10" content_type="text"> Chaimanee, Y., Jolly, D., Bennami, M., Tafforeau, P., Duzer, D., Moussa, I., and Jaeger, J. J.: A Middle Miocene hominoid from Thailand and orangutan origins, Nature, 422, 61–65, 2003. </reference>
		<reference numeration="11" content_type="text"> Chaimanee, Y., Yamee, C., Tian, P., Khaowiset, K., Marandat, B., Tafforeau, P., Nemoz, C., and Jaeger, J. J.: Khoratpithecus piriyai, a Late Miocene hominoid of Thailand, Amer. J. Phys. Anthrop., 131, 311–323, 2006. </reference>
		<reference numeration="12" content_type="text"> Chaimanee, Y., Yamee, C., Tian, P., Chavasseau, O., and Jaeger, J. J.: First middle Miocene sivaladapid primate from Thailand, J. Hum. Evol., 54, 434–443, 2008. </reference>
		<reference numeration="13" content_type="text"> Corsiri, R. and Crouch, A.: Mae Moh coal deposit: Electricity Generating Authority of Thailand, Report of Thailand Australia Lignite Mine Development Project, 1, 448, 1985. </reference>
		<reference numeration="14" content_type="text"> Coster, P., Benammi, M., Chaimanee, Y., Yamee, C., Chavasseau, O., Emonet, E., and Jaeger, J.: A complete magnetic-polarity stratigraphy of the Miocene continental deposits of Mae Moh Basin, northern Thailand, and a reassessment of the age of hominoid-bearing localities in northern Thailand, Geol. Soc. Am. Bull., 122, 1180–1191, 2010. </reference>
		<reference numeration="15" content_type="text"> Ducrocq, S., Chaimanee, Y., Suteethorn, V., and Jaeger, J. J.: Ages and paleoenvironment of Miocene mammalian faunas from Thailand, Palaeogeogr. Palaeoclimatol. Palaeoecol., 108, 149–163, 1994. </reference>
		<reference numeration="16" content_type="text"> eFloras: Flora of China, Missouri Botanical Garden, St. Louis, MO &amp; Harvard University Herbaria, Cambridge, MA, available online at: http://www.efloras.org (last access: May 2009), 2008. </reference>
		<reference numeration="17" content_type="text"> Faegri, K., Iversen, J., Kaland, P. E., and Krzywinski, K.: Textbook of Pollen Analysis, IV ed., John Wiley and Sons Ltd., Chichester, England, 328 pp., 1989. </reference>
		<reference numeration="18" content_type="text"> Germeraad, J. H., Hopping, A., and Muller, J.: Palynology of tertiary sediments from tropical areas, Rev. Palaeobot. Palynol., 6, 189–348, 1968. </reference>
		<reference numeration="19" content_type="text"> Ginsburg, L., Mein, P., and Thomas, H.: The Miocene of Thailand: Recent contribution to vertebrate paleontology and stratigraphy, The paleoenvironment of East Asia from the mid-Tertiary: Hong-Kong, University of Hong Kong, Centre of Asian Studies, Occasional Papers and Monographs, 77, 897–907, 1988. </reference>
		<reference numeration="20" content_type="text"> Guo, Z. T., Sun, B., Zhang, Z. S., Peng, S. Z., Xiao, G. Q., Ge, J. Y., Hao, Q. Z., Qiao, Y. S., Liang, M. Y., Liu, J. F., Yin, Q. Z., and Wei, J. J.: A major reorganization of Asian climate by the early Miocene, Clim. Past, 4, 153–174, doi:10.5194/cp-4-153-2008, 2008. </reference>
		<reference numeration="21" content_type="text"> Hall, R.: Cenozoic geological and plate tectonic evolution of SE Asia and the SW Pacific: computer-based reconstructions, model and animations, J. Asian. Earth. Sci., 20, 353–431, 2002. </reference>
		<reference numeration="22" content_type="text"> Hay, W. W., Soeding, E., DeConto, R. M., and Wold, C. N.: The Late Cenozoic uplift - climate change paradox, Int. J. Earth. Sci., 91, 746–774, 2002. </reference>
		<reference numeration="23" content_type="text"> Hooker, J. D.: The Flora of British India, L. Reeve &amp; Co Ltd, Covent Garden, 1875. </reference>
		<reference numeration="24" content_type="text"> Hoorn, C., Ohja, T., and Quade, J.: Palynological evidence for vegetation development and climatic change in the Sub-Himalayan Zone (Neogene, Central Nepal), Palaeogeogr. Palaeoclimatol. Palaeoecol., 163, 133–161, 2000. </reference>
		<reference numeration="25" content_type="text"> Huang, T.-C.: Pollen Flora of Taiwan, edited by: Press, N. T. U. B. D., Ching-Hwa Press co., Ltd., 297~pp., 1972. </reference>
		<reference numeration="26" content_type="text"> Jensen, M.: Trees and Fruits of Southeast Asia, 2 ed., Orchid Guides, Orchid Press, Bangkok, 234~pp., 2001. </reference>
		<reference numeration="27" content_type="text"> Kanzaki, M., Hara, M., Yamakura, T., Ohkubo, M., Tamura, M., Sri-Ngernyuang, K., Sahunalu, P., Teejuntuk, T., and Bunyavejchewin, S.: Doi Inthanon Forest Dynamics Plot, Thailand, Tropical Forest Diversity and Dynamism: Findings from a Large-Scale Network Forest Dynamics Plots&quot;(Ed. EC Losos, and EG Leigh), The University of Chicago Press, Chicago, Illinois, USA, 474–481, 2004. </reference>
		<reference numeration="28" content_type="text"> Kuchler, A. W. and Sawyer, J. O.: A study of the vegetation near Chiang Mai, Thailand, Trans. Kansas Acad. Sci., 70, 281–347, 1967. </reference>
		<reference numeration="29" content_type="text"> Kunimatsu, Y., Ratanasthien, B., Nakaya, H., Saegusa, H., and Nagaoka, S.: Hominoid fossils discovered from Chiang Muan, northern Thailand: The first step towards understanding hominoid evolution in Neogene Southeast Asia, Anthropol. Sci., 113, 85–93, 2005. </reference>
		<reference numeration="30" content_type="text"> Laskar, J., Robutel, P., Joutel, F., Gastineau, M., Correia, A. C. M., and Levrard, B.: A long-term numerical solution for the insolation quantities of the Earth, Astron. Astrophys., 428, 261–285, 2004. </reference>
		<reference numeration="31" content_type="text"> Letouzey, R.: Etude phytogéographique du Cameroun, Lechevalier Paris, 1968. </reference>
		<reference numeration="32" content_type="text"> Liu, X. and Yin, Z. Y.: Sensitivity of East Asian monsoon climate to the uplift of the Tibetan Plateau, Palaeogeogr. Palaeoclimatol. Palaeoecol., 183, 223–245, 2002. </reference>
		<reference numeration="33" content_type="text"> Maley, J. and Brenac, P.: Vegetation dynamics, palaeoenvironments and climatic changes in the forests of western Cameroon during the last 28 000 years BP, Rev. Palaeobot. Palynol., 99, 157–187, 1998. </reference>
		<reference numeration="34" content_type="text"> Maloney, B.: A 10 600 year pollen record from Nong Thale Song Hong, Trang Province, south Thailand, Bulletin of the Indo-Pacific Prehistory Association, 18, 129–137, 1999. </reference>
		<reference numeration="35" content_type="text"> Marivaux, L., Chaimanee, Y., Yamee, C., Srisuk, P., and Jaeger, J. J.: Discovery of Fallomus ladakhensis Nanda &amp; Sahni, 1998 (Mammalia, Rodentia, Diatomyidae) in the lignites of Nong Ya Plong (Phetchaburi Province, Thailand): systematic, biochronological and paleoenvironmental implications, Geodiversitas, 26, 493–507, 2004. </reference>
		<reference numeration="36" content_type="text"> Marivaux, L., Bocat, L., Chaimanee, Y., Jaeger, J. J., Marandat, B., Srisuk, P., Tafforeau, P., Yamee, C., and Welcomme, J. L.: Cynocephalid dermopterans from the Palaeogene of South Asia (Thailand, Myanmar and Pakistan): systematic, evolutionary and palaeobiogeographic implications, Zool. Scr., 35, 395–420, 2006. </reference>
		<reference numeration="37" content_type="text"> Maxwell, J. F. and Elliott, S.: Vegetation and Vascular Flora of Doi Sutep-Pui National Park, Northern Thailand, Thai. Stud. Biodivers., 5, 45–46, 2001. </reference>
		<reference numeration="38" content_type="text"> Morley, C. K., Woganan, N., Sankumarn, N., Hoon, T. B., Alief, A., and Simmons, M.: Late Oligocene–Recent stress evolution in rift basins of northern and central Thailand: implications for escape tectonics, Tectonophysics, 334, 115–150, 2001. </reference>
		<reference numeration="39" content_type="text"> Morley, C. K.: A tectonic model for the tertiary evolution of strike-slip faults and rift basins in SE Asia, Tectonophysics, 347, 189–215, 2002. </reference>
		<reference numeration="40" content_type="text"> Morley, R.: Palynological evidence for Tertiary plant dispersals in the SE Asian region in relation to plate tectonics and climate, in: Biogeography and geological evolution of SE Asia, edited by: Halloway, R. H. J. D., Backhuys, Leiden, 211–234, 1998. </reference>
		<reference numeration="41" content_type="text"> Morley, R. J.: Origin and Evolution of Tropical Rain Forests, John Wiley and Sons Ltd., Chichester, England, 362~pp., 2000. </reference>
		<reference numeration="42" content_type="text"> Neil, P. E.: Alnus nepalensis – a multipurpose tree for the tropical highlands, in: Nepal-United Kingdom Forestry Research Project - NFT Highlights, Department of Forestry and Plant Research, Kathmandu, Nepal, 1990. </reference>
		<reference numeration="43" content_type="text"> New, M., Lister, D., Hulme, M., and Makin, I.: A high-resolution data set of surface climate over global land areas, Clim. Res., 21, 1–25, 2002. </reference>
		<reference numeration="44" content_type="text"> Ogawa, H., Yoda, K., and Kira, T.: A preliminary survey on the vegetation of Thailand, Nature and Life in Southeast Asia, 1, 21–157, 1961. </reference>
		<reference numeration="45" content_type="text"> Parnell, J. A. N., Simpson, D. A., Moat, J., Kirkup, D. W., Chantaranothai, P., Boyce, P. C., Bygrave, P., Dransfield, S., Jebb, M. H. P., and Macklin, J.: Plant collecting spread and densities: their potential impact on biogeographical studies in Thailand, J. Biogeogr., 30, 193–209, 2003. </reference>
		<reference numeration="46" content_type="text"> Peigné, S., Chaimanee, Y., Yamee, C., Tian, P., and Jaeger, J. J.: A new amphicyonid (Mammalia, Carnivora, Amphicyonidae) from the late middle Miocene of northern Thailand and a review of the amphicyonine record in Asia, J. Asian. Earth Sci., 26, 519–532, 2006. </reference>
		<reference numeration="47" content_type="text"> Ramstein, G., Fluteau, F., Besse, J., and Joussaume, S.: Effect of orogeny, plate motion and land sea distribution on Eurasian climate change over the past 30 million years, Nature, 386, 788–795, 1997. </reference>
		<reference numeration="48" content_type="text">Rowley, D. and Currie, B.: Palaeo-altimetry of the late Eocene to Miocene Lunpola basin, central Tibet, Nature, 439, 677–681, 2006. </reference>
		<reference numeration="49" content_type="text"> Sawangchote, P., Grote, P., and Dilcher, D.: Tertiary leaf fossils of Mangifera (Anacardiaceae) from Li Basin, Thailand as examples of the utility of leaf marginal venation characters, Am. J. Bot., 96, 2048–2061, 2009. </reference>
		<reference numeration="50" content_type="text"> Sepulchre, P., Ramstein, G., Fluteau, F., Schuster, M., Tiercelin, J. J., and Brunet, M.: Tectonic uplift and Eastern Africa aridification, Science, 313, 1419–1423, 2006. </reference>
		<reference numeration="51" content_type="text"> Songtham, W., Ratanasthien, B., Mildenhall, D. C., Singharajwarapan, S., and Kandharosa, W.: Oligocene-Miocene climatic changes in northern Thailand resulting from extrusion tectonics of Southeast Asian landmass, Science Asia, 29, 221–233, 2003. </reference>
		<reference numeration="52" content_type="text"> Songtham, W., Ratanasthien, B., Watanasak, M., Mildenhall, D., Singharajwarapan, S., and Kandharosa, W.: Tertiary basin evolution in northern Thailand: a palynological point of view, Nat. Hist. Bull. Siam Soc., 53, 17–32, 2005. </reference>
		<reference numeration="53" content_type="text"> Sookchaloem, D.: Outline of the forest flora in Northeastern Thailand, Proceedings of the 42nd Kasetsart University Annual Conference, Kasetsart, Thailand, 3–6 February 2004, 40–47, 2004. </reference>
		<reference numeration="54" content_type="text"> Sun, X. and Wang, P.: How old is the Asian monsoon system?–-Palaeobotanical records from China, Palaeogeogr. Palaeoclimatol. Palaeoecol., 222, 181–222, 2005. </reference>
		<reference numeration="55" content_type="text"> Sytsma, K. J., Litt, A., Zjhra, M. L., Chris Pires, J., Nepokroeff, M., Conti, E., Walker, J., and Wilson, P. G.: Clades, Clocks, and Continents: Historical and Biogeographical Analysis of Myrtaceae, Vochysiaceae, and Relatives in the Southern Hemisphere, Int. J. Plant Sci., 165, 85–105, 2004. </reference>
		<reference numeration="56" content_type="text"> Tassy, P., Anupandhanant, P., Ginsburg, L., Mein, P., Ratanasthien, B., and Sutteethorn, V.: A new Stegolophodon (Proboscidea, Mammalia) from the early Miocene of northern Thailand, Geobios, 25, 511–523, 1992. </reference>
		<reference numeration="57" content_type="text"> Vincens, A., Tiercelin, J. J., and Buchet, G.: New Oligocene–early Miocene microflora from the southwestern Turkana Basin. Palaeoenvironmental implications in the northern Kenya Rift, Palaeogeogr. Palaeoclimatol. Palaeoecol., 239, 470–486, 2006. </reference>
		<reference numeration="58" content_type="text"> Wang, P., Clemens, S., Beaufort, L., Braconnot, P., Ganssen, G., Jian, Z., Kershaw, P., and Sarnthein, M.: Evolution and variability of the Asian monsoon system: state of the art and outstanding issues, Quaternary Sci. Rev., 24, 595–629, 2005. </reference>
		<reference numeration="59" content_type="text"> Watanasak, M.: Palaeoecological reconstruction of Nong Ya Plong Tertiary Basin (Central Thailand), Journal of ecology (Thailand), 15, 51–70, 1988. </reference>
		<reference numeration="60" content_type="text">Watanasak, M.: Palynological Zonation of Mid-Tertiary Intermontane Basins in Northern Thailand, International Symposium on Intermontane Basins: Geology and Resources, Thailand, 216–225, 1989. </reference>
		<reference numeration="61" content_type="text"> Watanasak, M.: Mid Tertiary palynostratigraphy of Thailand, J. Southe. Asian Earth, 4, 203–218, 1990. </reference>
		<reference numeration="62" content_type="text"> Watson, L. and Dallwitz, M. J.: The families of flowering plants: descriptions, illustrations, identification, and information retrieval, available online at: http://delta-intkey.com, (last access: December 2006), 1992. </reference>
		<reference numeration="63" content_type="text"> Werner, W.: Pines and other conifers in Thailand – a Quaternary relic?, J. Quaternary Sci., 12, 451–454, 1997. </reference>
		<reference numeration="64" content_type="text"> White, J. C., Penny, D., Kealhofer, L., and Maloney, B.: Vegetation changes from the late Pleistocene through the Holocene from three areas of archaeological significance in Thailand, Quaternary Int., 113, 111–132, 2004. </reference>
		<reference numeration="65" content_type="text"> Wilson, P. G., O&apos;Brien, M. M., Heslewood, M. M., and Quinn, C. J.: Relationships within Myrtaceae sensu lato based on a matK phylogeny, Plant Syst. Evol., 251, 3–19, 2005. </reference>
		<reference numeration="66" content_type="text"> Zachos, J., Pagani, M., Sloan, L., Thomas, E., and Billups, K.: Trends, Rhythms, and Aberrations in Global Climate 65 Ma to Present, Science, 292, 686–693, 2001a. </reference>
		<reference numeration="67" content_type="text"> Zachos, J., Shackleton, N., Revenaugh, J., Palike, H., and Flower, B.: Climate response to orbital forcing across the Oligocene-Miocene boundary, Science, 292, 274–278, 2001b. </reference>
		<reference numeration="68" content_type="text"> Zachos, J., Dickens, G., and Zeebe, R.: An early Cenozoic perspective on greenhouse warming and carbon-cycle dynamics, Nature, 451, 279–283, 2008. </reference>
		<reference numeration="69" content_type="text"> Zhongshi, Z., Wang, H., Guo, Z., and Jiang, D.: What triggers the transition of palaeoenvironmental patterns in China, the Tibetan Plateau uplift or the Paratethys Sea retreat ?, Palaeogeogr. Palaeoclimatol. Palaeoecol., 245, 317–331, 2007. </reference>
	</references>
</article>

