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Fossil coniferous wood from the Middle Jurassic of Liaoning Province, China
Authors:Hong-En Jiang  David K Ferguson  Cheng-Sen Li  Ye-Ming Cheng
Institution:aState Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;bAcademia Turfanica of Xinjiang Uygur Autonomous Region, Turpan 838000, China;cInstitute of Palaeontology, University of Vienna, Althanstraβe 14, A-1090 Vienna, Austria;dBeijing Museum of Natural History, Beijing 100050, China;eGeological Museum of China, Beijing 100034, China
Abstract:Silicified coniferous wood was collected from the Lanqi Formation (late Middle Jurassic in age) at Shebudaigou Village, Liaoning Province, China. Three taxa are identified, namely Pinoxylon dacotense Knowlton, Xenoxylon phyllocladoides Gothan, and Araucariopitys sp. Based on these new data, and those of other fossil plants reported previously from the same formation, we consider the climate during the deposition of the Lanqi Formation was subtropical, humid and seasonal. In this respect the Lanqi flora differs from the coeval Shimengou and Longmen floras from North China. The Longmen flora was deposited during more humid, subtropical conditions, while the Shimengou Formation indicates that the climate was warm temperate and dry. Our data would suggest that the Late Jurassic climatic pattern was initiated as early as the late Middle Jurassic.
Keywords:Lanqi Formation  Middle Jurassic  fossil wood  palaeoclimate  wood anatomy
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