Higher palaeoelevation in the Baoshan Basin: Implications for landscape evolution at the southeastern margin of the Tibetan Plateau

doi:10.1016/j.jop.2024.05.004

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Abstract

Surface uplift at the southeastern margin of the Tibetan Plateau has been widely studied, but more palaeoaltimetry data are required to better understand the elevation history of this geologically complex region. In this study, fossil leaves of Abies (Pinaceae), a cool-temperate element, recovered from the latest Miocene-Pliocene Yangyi Formation of the southern Baoshan Basin, were used as a proxy to estimate the local palaeoelevation. Based on the regional modern altitude range (2100-4280 m) of the genus as well as regional temperature discrepancy (1.5 °C) between the past and present, the palaeoelevation of the study area was calculated to be >2360 m above sea level as compared to 1670 m at present. Our result suggests that the southern Baoshan Basin experienced pronounced uplift prior to the time of fossil deposition, probably as a result of crustal shortening and thickening of the northern Baoshan Terrane during the Eocene-Oligocene. We infer that surface growth in areas south of the Dali Basin may have been greater than previously interpreted, and that a widespread plateau or plateau patches higher than 2000 m probably extended southwards into at least the Baoshan Basin by the latest Miocene-Pliocene. We also infer that the elevation of the southern Baoshan Basin has decreased by at least 690 m since then, in contrast to most other scenarios in which the elevation of the southeastern margin of the Tibetan Plateau has increased or remained close to modern levels since the late Miocene. The major cause of the inferred altitude decline is likely tectonic deformation. As a transtensional graben basin, the Baoshan Basin has experienced pull-apart and base-fall movement since the late Miocene, which would reduce the altitude of its southern part located on the hanging wall. Surface erosion associated with the increased summer rainfall might also have played a role especially in reducing the local relief, although its contribution can be limited. Our study provides one of the few palaeoelevation estimates from areas south of the Dali Basin and an example of past elevation loss at the southeastern margin of the Tibetan Plateau, thus shedding important light on the landscape evolution of this region.

Key words： Abies Lapse rate Palaeoaltimetry Surface uplift Tectonic movement Tibetan Plateau

Received: 18 December 2023

Corresponding Authors: ^*E-mail address: huangyongjiang@mail.kib.ac.cn (Y.-J. Huang).

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http://journal09.magtechjournal.com/Jweb_jop/EN/10.1016/j.jop.2024.05.004 OR http://journal09.magtechjournal.com/Jweb_jop/EN/Y2024/V13/I3/563

[1] Bei F., Song Z.Y., Lin L., Wu Z.,2000. Environgeological records of the fault basins of the Cenozoic in Yunnan Province. Advance in Earth Sciences, 15(1), 25-33. https://doi.org/10.3321/j.issn:1001-8166.2000.01.004 (in Chinese with English abstract).
[2] Blonder B., Buzzard V., Simova I., Sloat L., Boyle B., Lipson R., Aguilar-Beaucage B., Andrade A., Barber B., Barnes C., Bushey D., Cartagena P., Chaney M., Contreras K., Cox M., Cueto M., Curtis C., Fisher M., Furst L., Gallegos J., Hall R., Hauschild A., Jerez A., Jones N., Klucas A., Kono A., Lamb M., Matthai J.D.R., McIntyre C., McKenna J., Mosier N., Navabi M., Ochoa A., Pace L., Plassmann R., Richter R., Russakoff B., Aubyn H.S., Stagg R., Sterner M., Stewart E., Thompson T.T., Thornton J., Trujillo P.J., Volpe T.J., Enquist B.J., 2012. leaf-area shrinkage effect can bias paleoclimate and ecology research. American Journal of Botany, 99(11), 1756-1763. https://doi.org/10.3732/ajb.1200062.
[3] Clark M.K., House M.A., Royden L.H., Whipple K.X., Burchfiel B.C., Zhang X., Tang W., 2005. Late Cenozoic uplift of southeastern Tibet. Geology, 33(6), 525-528. https://doi.org/10.1130/G21265.1.
[4] Clark M.K., Royden L.H., 2000. Topographic ooze: Building the eastern margin of Tibet by lower crustal flow. Geology, 28(8), 703-706. https://doi.org/10.1130/0091-7613(2000)28<703:TOBTEM>2.0.CO;2.
[5] Dai S.L., Liu S.G., Zhao Y.S., Zhao Z.J., Gao F.Z., Wu S.L., Mou F.R., 1998. The formation and evolution of the Baoshan Basin, Yunnan Province.Experimental Petroleum Geology, 20(2), 116-123 (in Chinese with English abstract).
[6] Dörken V.M., Lepetit B., 2018. Morpho‐anatomical and physiological differences between sun and shade leaves in Abies alba Mill. (Pinaceae, Coniferales): A combined approach. Plant, Cell and Environment, 41(7), 1683-1697. https://doi.org/10.1111/pce.13213.
[7] Farjon A., Filer D., 2013. An Atlas of the World’s Confers: An Analysis of their Distribution, Biogeography, Diversity and Conservation Status. Brill Academic Publishers, Leiden, Boston.
[8] Farnsworth A., Valdes P.J., Spicer R.A., Ding L., Witkowski C., Lauretano V., Su T., Li S., Li S., Zhou Z.,2021. Paleoclimate model-derived thermal lapse rates: Towards increasing precision in paleoaltimetry studies. Earth and Planetary Science Letters, 564, 116903. https://doi.org/10.1016/j.epsl.2021.116903.
[9] Fauquette S., Clauzon G., Suc J.-P., Zheng Z., 1999. A new approach for palaeoaltitude estimates based on pollen records: Example of the Mercantour Massif (southeastern France) at the earliest Pliocene. Earth and Planetary Science Letters, 170(1-2), 35-47. https://doi.org/10.1016/S0012-821X(99)00093-X.
[10] Fu L.K., Li N., Mill R.R., 1999. Pinaceae. In: Wu, Z.Y., Raven, P.H. (Eds.), Flora of China, vol. 4. Science Press, Beijing; Missouri Botanical Garden Press, St. Louis, pp. 11-52.
[11] Fu L.K., Xiang Q.P., Li N., 2000. Pinaceae. In: Fu, L.K., Chen, T.Q., Lang, K.Y., Hong, T. (Eds.), Higher Plants of China, vol. 3. Qingdao Publishing House, Qingdao, pp. 14-67 (in Chinese).
[12] Ge H.R., Li D.Y., 1999. Cenozoic Coal-bearing Basins and Coal-forming Regularity in West Yunnan. Yunnan Science and Technology Press, Kunming (in Chinese).
[13] Ghimire B., Lee C., Yang J., Heo K., 2015. Comparative leaf anatomy of some species of Abies and Picea (Pinaceae). Acta Botânica Brasílica, 29(3), 346-353. https://doi.org/10.1590/0102-33062014abb0009.
[14] He Y., Li N., Wang Z., Wang H., Yang G., Xiao L., Wu J., Sun B.,2014. Quercus yangyiensis sp. nov. from the late Pliocene of Baoshan, Yunnan and its paleoclimatic significance. Acta Geologica Sinica (English Edition), 88(3), 738-747. https://doi.org/10.3969/j.issn.1000-9515.2014.03.004.
[15] Herbert T.D., Lawrence K.T., Tzanova A., Peterson L.C., Caballero-Gill R.P., Kelly C.S., 2016. Late Miocene global cooling and the rise of modern ecosystems. Nature Geoscience, 9(11), 843-847. https://doi.org/10.1038/NGEO2813.
[16] Hoke G.D.,2018. Geochronology transforms our view of how Tibet’s southeast margin evolved. Geology, 46(1), 95-96. https://doi.org/10.1130/focus012018.1.
[17] Hoke G.D., Jing L.Z., Hren M.T., Wissink G.K., Garzione C.N.,2014. Stable isotopes reveal high southeast Tibetan Plateau margin since the Paleogene. Earth and Planetary Science Letters, 394, 270-278. https://doi.org/10.1016/j.epsl.2014.03.007.
[18] Huang Y.J., Chen W.Y., Jacques F.M.B., Liu, Y.S.C., Utescher, T., Su, T., Ferguson, D.K., Zhou, Z.K., 2015. Late Pliocene temperatures and their spatial variation at the southeastern border of the Qinghai-Tibet Plateau. Journal of Asian Earth Sciences, 111, 44-53. https://doi.org/10.1016/j.jseaes.2015.04.048.
[19] Huang Y.J., Ji X.P., Su T., Deng C.L., Ferguson D.K., Yu T.S., Yang X., Sun H., Zhou Z.K.,2017. Habitat, climate and potential plant food resources for the late Miocene Shuitangba hominoid in Southwest China: Insights from carpological remains. Palaeogeography, Palaeoclimatology, Palaeoecology, 470, 63-71. https://doi.org/10.1016/j.palaeo.2017.01.014.
[20] Huang Y.J., Jia L.B., Su T., Zhu H., Momohara A., Gu Z.J., Zhou Z.K.,2020. A warm-temperate forest of mixed coniferous type from the upper Pliocene Sanying Formation (southeastern edge of Tibetan Plateau) and its implications for palaeoecology and palaeoaltimetry. Palaeogeography, Palaeoclimatology, Palaeoecology, 538, 109486. https://doi.org/10.1016/j.palaeo.2019.109486.
[21] Huang Y.J., Momohara A., Li S.F., Ji X.P., Qiu J., Jia L.B., Hu J.J., Ji Y.H., Zhou Z.K.,2023. Wildfire associated with a deciduous broadleaved forest from the Neogene Baoshan Basin at the southeastern margin of the Tibetan Plateau. Journal of Palaeogeography, 12(3), 448-462. https://doi.org/10.1016/j.jop.2023.05.004.
[22] Jacques F.M.B., Guo, S.X., Su, T., Xing, Y.W., Huang, Y.J., Liu, Y.S., Ferguson, D.K., Zhou, Z.K., 2011. Quantitative reconstruction of the Late Miocene monsoon climates of southwest China: A case study of the Lincang flora from Yunnan Province. Palaeogeography, Palaeoclimatology, Palaeoecology, 304(3-4), 318-327. https://doi.org/10.1016/j.palaeo.2010.04.014.
[23] Kim K., Whang S.S., Hill R.S., 1999. Cuticle micromorphology of leaves of Pinus (Pinaceae) in east and south-east Asia. Botanical Journal of the Linnean Society, 129(1), 55-74. https://doi.org/10.1111/j.1095-8339.1999.tb00490.x.
[24] Kornfeld D., Eckert S., Appel E., Ratschbacher L., Pfänder J., Liu D.L., Ding L., 2014. Clockwise rotation of the Baoshan Block due to southeastward tectonic escape of Tibetan crust since the Oligocene. Geophysical Journal International, 197(1), 149-163. https://doi.org/10.1093/gji/ggu009.
[25] Kou X.Y., Ferguson D.K., Xu J.X., Wang Y.F., Li C.S., 2006. The reconstruction of paleovegetation and paleoclimate in the late Pliocene of West Yunnan, China. Climatic Change, 77(3), 431-448. https://doi.org/10.1007/s10584-005-9039-5.
[26] Leloup P.H., Lacassin R., Tapponnier P., Schärer U., Zhong D.L., Liu X.H., Zhang L.S., Ji S.C., Trinh P.T., 1995. The Ailao Shan-Red River shear zone (Yunnan, China), Tertiary transform boundary of Indochina. Tectonophysics, 251, 3-84. https://doi.org/10.1016/0040-1951(95)00070-4.
[27] Li J., Duan Y.P., Cai X.Z., Wang T., Pan B.H.,2022. Application of cuticular micromorphology of the cuticle of Pinus needles in taxonomy. Bulletin of Botanical Research, 42(3), 341-351. https://doi.org/10.7525/j.issn.1673-5102.2022.03.003 (in Chinese with English abstract).
[28] Li, S.H., Advokaat, E.L., van Hinsbergen, D.J.J., Koymans, M., Deng, C.L., Zhu, R.X., 2017. Paleomagnetic constraints on the Mesozoic-Cenozoic paleolatitudinal and rotational history of Indochina and South China: Review and updated kinematic reconstruction. Earth-Science Reviews, 171, 58-77. https://doi.org/10.1016/j.earscirev.2017.05.007.
[29] Li S.H., Ji X.P., Harrison T., Deng C.L., Wang S.Q., Wang L.R., Zhu R.X.,2020b. Uplift of the Hengduan Mountains on the southeastern margin of the Tibetan Plateau in the late Miocene and its paleoenvironmental impact on hominoid diversity. Palaeogeography, Palaeoclimatology, Palaeoecology, 553, 109794. https://doi.org/10.1016/j.palaeo.2020.109794.
[30] Li S.H., Su T., Spicer R.A., Xu C.L., Sherlock S., Halton A., Hoke G., Tian Y.M., Zhang S.T., Zhou Z.K., Deng C.L., Zhu R.X., 2020c. Oligocene deformation of the Chuandian terrane in the SE margin of the Tibetan Plateau related to the extrusion of Indochina. Tectonics, 39(7), e2019TC005974. https://doi.org/10.1029/2019TC005974.
[31] Li S.H., van Hinsbergen D.J.J., Deng C.L., Advokaat E.L., Zhu R.X., 2018. Paleomagnetic constraints from the Baoshan area on the deformation of the Qiangtang-Sibumasu terrane around the eastern Himalayan syntaxis. Journal of Geophysical Research: Solid Earth, 123(2), 977-997. https://doi.org/10.1002/2017JB015112.
[32] Li S.H., van Hinsbergen, D.J.J., Najman, Y., Liu-Zeng, J., Deng, C.L., Zhu, R.X., 2020a. Does pulsed Tibetan deformation correlate with Indian plate motion changes? Earth and Planetary Science Letters, 536, 116144. https://doi.org/10.1016/j.epsl.2020.116144.
[33] Li S.Y., Currie B.S., Rowley D.B., Ingalls M.,2015. Cenozoic paleoaltimetry of the SE margin of the Tibetan Plateau: Constraints on the tectonic evolution of the region. Earth and Planetary Science Letters, 432, 415-424. https://doi.org/10.1016/j.epsl.2015.09.044.
[34] Liu L.H., Yu Y.D., Zhang J.H., 1984. The division of vertical vegetation zone in Hengduanshan.Acta Botanica Yunnanica, 6(2), 205-216 (in Chinese with English abstract).
[35] Liu T.S.,1971. A Monograph of the Genus Abies. National Taiwan University, Taipei.
[36] Lynch J.A., Clark J.S., Stocks B.J., 2004. Charcoal production, dispersal, and deposition from the Fort Providence experimental fire: Interpreting fire regimes from charcoal records in boreal forests. Canadian Journal of Forest Research, 34(8), 1642-1656. https://doi.org/10.1139/x04-071.
[37] Ma Q.W., Zhang J.B.,2003. Epidermal structures of Metasequoia glyptostroboides Hu et Cheng (Taxodiaceae). Bulletin of Botanical Research, 23(1), 32-35. https://doi.org/10.3969/j.issn.1673-5102.2003.01.008 (in Chinese with English abstract).
[38] Men Y.P., Mou C.L., Xu X.S., Yu Q., Yan J.F., Kang J.W.,2015. Palaeogeographic characteristics and geological conditions of petroleum of Neogene in Yunnan Baoshan Basin. Coal Technology, 34(11), 115-116. https://doi.org/10.13301/j.cnki.ct.2015.11.042 (in Chinese with English abstract).
[39] Miao Y.F., Fang X.M., Sun J.M., Xiao W.J., Yang Y.H., Wang X.L., Farnsworth A., Huang K.Y., Ren Y.L., Wu F., Qiao Q.Q., Zhang W.L., Meng Q.Q., Yan X.L., Zheng Z., Song C.H., Utescher T., 2022. A new biologic paleoaltimetry indicating Late Miocene rapid uplift of northern Tibet Plateau. Science, 378(6624), 1074-1079. https://doi.org/10.1126/science.abo2475.
[40] Miranda V., Chaphekar M., 1980. SEM study of the inner periclinal surface of leaf cuticles in the family Pinaceae. Botanical Journal of the Linnean Society, 81(1), 61-78. https://doi.org/10.1111/j.1095-8339.1980.tb00943.x.
[41] Momohara A., Zhou Z., Li X., Setoguchi H., 2006. Cenozoic flora withQuercus sect. Heterobalanus in the western Yunnan Province, southwestern China. Japanese Journal of Historical Botany, 14, 43-44 (in Japanese).
[42] Mosbrugger V., Utescher T., Dilcher D.L., 2005. Cenozoic continental climatic evolution of Central Europe. Proceedings of the National Academy of Sciences of the United States of America, 102(42), 14964-14969. https://doi.org/10.1073/pnas.0505267102.
[43] Ohlson M., Tryterud E., 2000. Interpretation of the charcoal record in forest soils: Forest fires and their production and deposition of macroscopic charcoal. The Holocene, 10(4), 519-525. https://doi.org/10.1191/095968300667442551.
[44] Pu Z.W., Yang Z.Y., Tong Y.B., Zhao Y., Wang H.,2018. Paleomagnetic study of Pliocene lacustrine strata in the Baoshan Basin at the southeastern edge of the Tibetan Plateau. Geological Bulletin of China, 37(5), 759-775. https://doi.org/10.3969/j.issn.1671-2552.2018.05.002 (in Chinese with English abstract).
[45] Royden L.H., Burchfiel B.C., van der Hilst R.D., 2008. The geological evolution of the Tibetan Plateau. Science, 321(5892), 1054-1058. https://doi.org/10.1126/science.1155371.
[46] Salzmann U., Williams M., Haywood A.M., Johnson A.L.A., Kender, S., Zalasiewicz, J., 2011. Climate and environment of a Pliocene warm world. Palaeogeography, Palaeoclimatology, Palaeoecology, 309(1-2), 1-8. https://doi.org/10.1016/j.palaeo.2011.05.044.
[47] Semerikova S.A., Khrunyk Y.Y., Lascoux M., Semerikov V.L.,2018. From America to Eurasia: A multigenomes history of the genus Abies. Molecular Phylogenetics and Evolution, 125, 14-28. https://doi.org/10.1016/j.ympev.2018.03.009.
[48] Socquet A., Pubellier M.,2005. Cenozoic deformation in western Yunnan (China-Myanmar border). Journal of Asian Earth Sciences, 24(4), 495-515. https://doi.org/10.1016/j.jseaes.2004.03.006.
[49] Song X.Y., Spicer R.A., Yang J., Yao Y.F., Li C.S.,2010. Pollen evidence for an Eocene to Miocene elevation of central southern Tibet predating the rise of the High Himalaya. Palaeogeography, Palaeoclimatology, Palaeoecology, 297(1), 159-168. https://doi.org/10.1016/j.palaeo.2010.07.025.
[50] Stevenson K.J.,2011. Review of OriginPro 8.5. Journal of the American Chemical Society, 133(14), 5621. https://doi.org/10.1021/ja202216h.
[51] Su, T., Jacques, F.M.B., Spicer, R.A., Liu, Y.S., Huang, Y.J., Xing, Y.W., Zhou, Z.K., 2013. Post-Pliocene establishment of the present monsoonal climate in SW China: Evidence from the late Pliocene Longmen megaflora. Climate of the Past, 9(4), 1911-1920. https://doi.org/10.5194/cp-9-1911-2013.
[52] Su T., Spicer R.A., Li S.H., Xu H., Huang J., Sherlock S., Huang Y.J., Li S.F., Wang L., Jia L.B., Deng W.Y.D., Liu J., Deng C.L., Zhang S.T., Valdes P.J., Zhou Z.K., 2019. Uplift, climate and biotic changes at the Eocene-Oligocene transition in south-eastern Tibet. National Science Review, 6(3), 495-504. https://doi.org/10.1093/nsr/nwy062.
[53] Sun B., Wang Y.F., Li C.S., Yang J., Li J.F., Li Y.L., Deng T., Wang S.Q., Zhao M., Spicer R.A., Ferguson D.K., Mehrotra R.C., 2015. Early Miocene elevation in northern Tibet estimated by palaeobotanical evidence. Scientific Reports, 5(1), 10379. https://doi.org/10.1038/srep10379.
[54] Sun B.N., Wu J.Y., Liu Y.S.C., Ding, S.T., Li, X.C., Xie, S.P., Yan, D.F., Lin, Z.C., 2011. Reconstructing Neogene vegetation and climates to infer tectonic uplift in western Yunnan, China. Palaeogeography, Palaeoclimatology, Palaeoecology, 304(3-4), 328-336. https://doi.org/10.1016/j.palaeo.2010.09.023.
[55] Sun H.S., Liu S.G., 1998. The formation and evolution of Baoshan Basin, Yunnan Province.Journal of Mineralogy and Petrology, 18(S1), 178-180 (in Chinese with English abstract).
[56] Tang M.Y.,Liu-Zeng, J., Hoke, G.D., Xu, Q., Wang, W.T., Li, Z.F., Zhang, J.Y., Wang, W., 2017. Paleoelevation reconstruction of the Paleocene-Eocene Gonjo Basin, SE-central Tibet. Tectonophysics, 712-713, 170-181. https://doi.org/10.1016/j.tecto.2017.05.018.
[57] Tapponnier P., Peltzer G., Le Dain A.Y., Armijo R., Cobbold P., 1982. Propagating extrusion tectonics in Asia: New insights from simple experiments with plasticine. Geology, 10(12), 611-616. https://doi.org/10.1130/0091-7613(1982)10<611:PETIAN>2.0.CO;2.
[58] Tong Y.B., Yang Z.Y., Jing X.Q., Zhao Y., Li C.H., Huang D.J., Zhang X.D., 2016. New insights into the Cenozoic lateral extrusion of crustal blocks on the southeastern edge of Tibetan Plateau: Evidence from paleomagnetic results from Paleogene sedimentary strata of the Baoshan Terrane. Tectonics, 35(11), 2494-2514. https://doi.org/10.1002/2016TC004221.
[59] Tong Y.B., Yang Z.Y., Mao C.P., Pei J.L., Pu Z.W., Xu Y.C.,2017. Paleomagnetism of Eocene red-beds in the eastern part of the Qiangtang Terrane and its implications for uplift and southward crustal extrusion in the southeastern edge of the Tibetan Plateau. Earth and Planetary Science Letters, 475, 1-14. https://doi.org/10.1016/j.epsl.2017.07.026.
[60] Urban, T., Hardisty, F.2013. Developing PAMS — A paleolocation web service. In: Buchroithner, M.F. (Ed.), Proceedings of the 26th International Cartographic Conference, Dresden, Germany, 25-30 August 2013, pp. 129-129.
[61] Utescher T., Bruch A.A., Micheels A., Mosbrugger V., Popova S.,2011. Cenozoic climate gradients in Eurasia — A palaeo-perspective on future climate change? Palaeogeography, Palaeoclimatology, Palaeoecology, 304(3-4), 351-358. https://doi.org/10.1016/j.palaeo.2010.09.031.
[62] Wang C.R., Hren M.T., Hoke G.D.,Liu-Zeng, J., Garzione, C.N., 2017. Soil n-alkane δD and glycerol dialkyl glycerol tetraether (GDGT) distributions along an altitudinal transect from southwest China: Evaluating organic molecular proxies for paleoclimate and paleoelevation. Organic Geochemistry, 107, 21-32. https://doi.org/10.1016/j.orggeochem.2017.01.006.
[63] Wang E., Burchfiel B.C., 1997. Interpretation of Cenozoic tectonics in the right-lateral accommodation zone between the Ailao Shan shear zone and the Eastern Himalayan syntaxis. International Geology Review, 39(3), 191-219. https://doi.org/10.1080/00206819709465267.
[64] Wang G., Wan J.L., Wang E., Zheng D.W., Li F.,2008. Late Cenozoic to recent transtensional deformation across the southern part of the Gaoligong shear zone between the Indian Plate and SE margin of the Tibetan Plateau and its tectonic origin. Tectonophysics, 460(1), 1-20. https://doi.org/10.1016/j.tecto.2008.04.007.
[65] Wang Y.J., Fan W.M., Zhang Y.H., Peng T.P., Chen X.Y., Xu Y.G.,2006. Kinematics and ⁴⁰Ar/³⁹Ar geochronology of the Gaoligong and Chongshan shear systems, western Yunnan, China: Implications for early Oligocene tectonic extrusion of SE Asia. Tectonophysics, 418(3), 235-254. https://doi.org/10.1016/j.tecto.2006.02.005.
[66] Whang S.S., Kim K., Hill R.S., 2004. Cuticle micromorphology of leaves of Pinus (Pinaceae) from North America. Botanical Journal of the Linnean Society, 144(3), 303-320. https://doi.org/10.1111/j.1095-8339.2003.00245.x.
[67] Whang S.S., Pak J.H., Hill R.S., Kim K.,2001. Cuticle micromorphology of leaves of Pinus(Pinaceae) from Mexico and Central America. Botanical Journal of the Linnean Society, 135(4), 349-373. https://doi.org/10.1006/bojl.2000.0388.
[68] Wu F.L., Gao S.J., Tang F.J., Meng Q.Q., An C.R.,2019. A late Miocene-early Pleistocene palynological record and its climatic and tectonic implications for the Yunnan Plateau, China. Palaeogeography, Palaeoclimatology, Palaeoecology, 530, 190-199. https://doi.org/10.1016/j.palaeo.2019.05.037.
[69] Wu J., Zhang K.X., Xu Y.D., Wang G.C., Garzione C.N., Eiler J., Leloup P.H., Sorrel P., Mahéo G.,2018. Paleoelevations in the Jianchuan Basin of the southeastern Tibetan Plateau based on stable isotope and pollen grain analyses. Palaeogeography, Palaeoclimatology, Palaeoecology, 510, 93-108. https://doi.org/10.1016/j.palaeo.2018.03.030.
[70] Xia K., Su T., Liu Y.S., Xing Y.W., Jacques F.M.B., Zhou, Z.K., 2009. Quantitative climate reconstructions of the late Miocene Xiaolongtan megaflora from Yunnan, southwest China. Palaeogeography, Palaeoclimatology, Palaeoecology, 276, 80-86. https://doi.org/10.1016/j.palaeo.2009.02.024.
[71] Xiang Q.P., Fu L.K., 1998. SEM observation on the structure of cuticles on leaf inner surface ofAbies(Pinaceae) and its significance in systematics. Acta Phytotaxonomica Sinica, 36(5), 441-448 (in Chinese with English abstract).
[72] Xiang Q.P., Wei R., Shao Y.Z., Yang Z.Y., Wang X.Q., Zhang X.C.,2015. Phylogenetic relationships, possible ancient hybridization, and biogeographic history of Abies(Pinaceae) based on data from nuclear, plastid, and mitochondrial genomes. Molecular Phylogenetics and Evolution, 82, 1-14. https://doi.org/10.1016/j.ympev.2014.10.008.
[73] Xiang Q.P., Wei R., Zhu Y.M., Harris A.J., Zhang X.C., 2018. New infrageneric classification of Abies in light of molecular phylogeny and high diversity in western North America. Journal of Systematics and Evolution, 56(5), 562-572. https://doi.org/10.1111/jse.12458.
[74] Xing Y.W., Utescher T., Jacques F.M.B., Su, T., Liu, Y.S., Huang, Y.J., Zhou, Z.K., 2012. Paleoclimatic estimation reveals a weak winter monsoon in southwestern China during the late Miocene: Evidence from plant macrofossils. Palaeogeography, Palaeoclimatology, Palaeoecology, 358-360, 19-26. https://doi.org/10.1016/j.palaeo.2012.07.011.
[75] Xiong Z.Y., Ding L., Spicer R.A., Farnsworth A., Wang X., Valdes P.J., Su T., Zhang Q.H., Zhang L.Y., Cai F.L., Wang H.Q., Li Z.Y., Song P.P., Guo X.D., Yue Y.H.,2020. The early Eocene rise of the Gonjo Basin, SE Tibet: From low desert to high forest. Earth and Planetary Science Letters, 543, 116312. https://doi.org/10.1016/j.epsl.2020.116312.
[76] Xu H., Su T., Zhang S.T., Deng M., Zhou Z.K.,2016. The first fossil record of ring-cupped oak(Quercus L. subgenus Cyclobalanopsis2015.11.014.
[77] Xu J.X.,2002. Palynology, paleovegetation and paleoclimate of Neogene, central-western Yunnan, China. Ph.D. thesis, Institute of Botany, Chinese Academy of Sciences, Beijing (in Chinese with English abstract).
[78] Xu J.X., Blackmore S., Wang Y.F., Li C.S., 2004. Late Pliocene vegetation and climate of Yangyi region, Yunnan of China, based on palynological data. Palaeontographica Abteilung B, 269, 131-148. https://doi.org/10.1127/palb/269/2004/131.
[79] Yao Y.F., Bruch A.A., Cheng Y.M., Mosbrugger V., Wang Y.F., Li C.S., 2012. Monsoon versus uplift in southwestern China — Late Pliocene climate in Yuanmou Basin, Yunnan. PLoS ONE, 7(5), e37760. https://doi.org/10.1371/journal.pone.0037760.
[80] Zachos J., Pagani M., Sloan L., Thomas E., Billups K., 2001. Trends, rhythms, and aberrations in global climate 65 Ma to present. Science, 292(5517), 686-693. https://doi.org/10.1126/science.1059412.
[81] Zheng W.J.,1983. Sylva Sinica Ⅰ. China Forestry Publishing House, Beijing (in Chinese).
[82] Zong H.R., Wang N., Huang Y.J., 2023. Neogene Picea leaves from the Baoshan Basin of Yunnan and their implication for paleoaltimetry. Acta Palaeontologica Sinica, 62(3), 410-423. https://doi.org/10.19800/j.cnki.aps.2023011 (in Chinese with English abstract).