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2015, 34(4) 879-885 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Discovery of petrified wood from Lower Cretaceous Jiufotang Formation in Yixian of western Liaoning��NE China and its significance |
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WANG Xiu-Qin, TIAN Ning, WANG Yong-Dong, ZHU Zhi-Peng, LI Yu-Ling |
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1. Department of Biochemical Engineering��Chaoyang Teachers College��Chaoyang 122000��Liaoning��China; 2. College of Palaeontology��Shenyang Normal University��Shenyang 110034��China; 3. Nanjing Institute of Geology and Palaeontology��Chinese Academy of Sciences��Nanjing 210008��China; 4. Key Laboratory of Economic Stratigraphy and Palaeogeography��Chinese Academy of Sciences��Nanjing 210008��China; 5. State Key Laboratory of Palaeobiology and Stratigraphy��Nanjing Institute of Geology and Palaeontology�� Chinese Academy of Sciences��Nanjing 210008��China; 6. Key Laboratory for Evolution of Past Life in Northeast Asia��Ministry of Land and ��esources��Shenyang 110034��China |
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Abstract��
New fossil wood material was reported for the first time from the Lower Cretaceous Jiufotang Forma- tion in Yixian of western Liaoning��NE China�� These fossil woods are silicified preserved��in which one specimen is anatomically preserved with pith��primary xylem and secondary xylem�� The pith is mainly composed of paren- chymatous cells�� The primary xylem is with an endarch maturation�� Anatomical details of the secondary xylem can be taxonomically referred to the morphogenus Protophyllocladoxylon Kr�|usel�� Additionally��numerous small holes occurred on the surface of some fossil wood specimens��which is guessed the foraging marks of insect larvae�� It is noted that numerous fossil charcoals were found associated with these fossil woods�� The presence of fossil charcoal indicates that natural wild fires��most probably ignited by volcanic eruptions��may have occurred in the Yixian re- gion during the sedimentary stage of the Jiufotang Formation in the Early Cretaceous�� |
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Keywords��
petrified wood
fossil charcoal
Protophyllocladoxylon
Early Cretaceous
Jiufotang Formation
Yixian
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