Abstract
The Jianshangou Bed is a set of fossil-bearing sedimentary interlayers of the basal volcano-sedimentary deposits of Yixian Formation in western Liaoning. It is rich in volcanic composition and consists of upper and lower grey-black shale, basal sandy conglomerate, top tuffaceous sandstone, middle massive silty mudstone and siltstone, as well as andesite, with a thickness of 28-95 m. The Jianshangou Bed is famous all over the world for its bearing early birds, angiosperms and feathered dinosaurs, and it also yields bivalves, gastropods, conchostracans, ostracods, shrimps, insects, fish, amphibians, primitive mammals and other reptiles. These fossils are typical representatives of the Late Mesozoic Jehol Biota from eastern Asia. The Chaomidianzi and Sihetun formations, proposed in recent years, are regarded as the junior synonyms of the Jianshangou Bed. The Jehol Biota is endemic to eastern Asia, however, it has a large geographic distribution, more than half of the European territory. Many species of the biota have close relationships with the late Jurassic European counterparts, e.g. both Confuciusornis and Archaeopteryx are primitive birds, Sinosauropteryx has a similar skeleton construction with Compsognathus, the ostracode assemblage from the Jianshangou Bed is close to that from the Purbeck Bed in England, and Aeschnidium occurs in both the Jianshangou Bed and Solnhofen of Germany. Based on the biostratigraphic correlation, the Jianshangou Bed is more probably late Tithonian in age. The latest zircon U-Pb dating of the Jianshangou Bed gives 125.2 Ma, and is close to the feldspar Ar/Ar dating of 124.6 Ma. A glauconite dating of 125 Ma was once got from England near the J/K boundary within the Purbeck Bed, so it is still problematic to place the J/K boundary at 130, 135, 137, 142 or 145.5 Ma in the International Stratigraphic Charts.
Similar content being viewed by others
References
Chen, P. J., Wen, S. X., Zhou, Z. Y. et al., Studies on the Late Mesozoic continential formations of western Liaoning, Bulletin of Nanjing Institute of Geology and Palaeontology, Academia Sinica (in Chinese), 1980, 1: 22–55.
Chen, P. J., Wu, S. Q., Research advances and prospecting on the Jehol Biota, Collected works of International Symposium on Geological Science (ed. Department of Geology, Peking University) (in Chinese), Beijing: Seismic Publishing House, 1998, 355–359
Chen, P. J., Distribution and spread of the Jehol Biota, Palaeoworld (in Chinese), 1999, 11: 1–6.
Wang, X. L., Wang, Y. Q., Wang, Y. et al., Stratigraphic sequence and vertebrate-bearing beds of the lower part of the Yixian Formation in Sihetun and neighboring area, western Liaoning, China, Vertebrata PalAsiatica (in Chinese), 1998, 36(2): 81–101.
Wang, X. L., Wang, Y. Q., Zhang, F. C. et al., Vertebrate biostratigraphy of the Lower Cretaceous Yixian Formation in Lingyuan, western Liaoning and its neighboring southern Nei Mongol (Inner Mongolia), China, Vertebrata PalAsiatica (in Chinese), 2000, 38(2): 81–99.
Li, W. B., Liu, Z. S., Sporomorph assemblage from the basal Yixian Formation in Western Liaoning and its geological age, Palaeoworld (in Chinese), 1999, 11: 68–79.
Pan, H. Z., Zhu, X. G., Fossil gastropods of the lower part of the Yixian Formation from Sihetun area, Western Liaoning, China, Palaeoworld (in Chinese), 1999, 11: 80–91.
Shen, Y. B., Schram, F. R., Taylor, R. S., Liaoningogriphus quadripartitus (Malacostraca: Spelaeogriphacea) from the Jehol Biota and notes on its paleoecology, Palaeoworld (in Chinese), 11: 175-187.
Chang, M. M., Chen, P. J., Wang, Y. Q. et al., The Jehol Biota (in Chinese), Shanghai: Shanghai Scientific and Technical Publishers, 2001, 1-150.
Ji, S. A., Ren, D., On the sequence and age of the protobirds-bearing deposits in the Sihetun-Jianshangou Area, Beipiao, western Liaoning Province, Professional papers of Stratigr. and Palaeont. (in Chinese), 1999, 27: 74–80.
Li, Y. P., Dong, G. Y., Fan, G. Q., Mesozoic fossil bird in West Liaoning with the subdivision and age of their overlying and underlying strata, Liaoning Geology (in Chinese), 1998, 15(3): 175–184.
Swisher III, C. C., Wang, Y. Q., Wang, X. L. et al., Cretaceous age for the feathered dinosaurs of Liaoning, China, Nature, 1999, 400: 58–61.
Smith, J. B., Harris, J. D., Omar, G. I. et al., Biostratigraphy and avian origins in northern China, New Perspective on the origin and early evolution of birds (Proceedings of the International Symposium in Honor of John H. Ostrom) (eds. Gauthier, J., Gall, L. E.), New Haven: Peabody Museum Nat. Hist. Yale Univ., 2001, 549–589.
Ji, Q, Ji, S. A., On discovery of the earliest bird fossil in China and the origin of birds, Chinese Geology (in Chinese), 1996, 233: 30–33.
Ji, Q, Ji, S. A., Protarchaeopteryx gen. nov., a new genus of Archaeopterygidae in China, Chinese Geology (in Chinese), 1997, 238: 38–41.
Chen, P. J., Dong, Z. M., Zhen, S. N., An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China, Nature, 1998, 391: 147–152.
Xu, X., Wang, X. L., Wu, X. C., A dromaeosaurid dinosaur with a filamentous integument from the Yixian Formation of China, Nature, 1999, 401: 262–266.
Zhou, Z. H., Barrett, P. M., Hilton, J., An exceptionally preserved Lower Cretaceous ecosystem, Nature, 2003, 421: 807–814.
Wu, S. Q., A preliminary study of the Jehol Flora from Western Liaoning. Palaeoworld (in Chinese), 1999, 11: 7–57.
Wang, Y., A new salamander (Amphibia: Caudata) from the Early Cretaceous Jehol Biota, Vertebrata PalAsiatica (in Chinese), 2000, 38(2): 100–103.
Ren, D., Gao, K. Q., Guo, Z. G. et al, Stratigraphic division of the Jurassic in the Daohugou area, Ningcheng, Inner Mongolia, Geological Bulletin of China (in Chinese), 2002, 21(8–9): 584–591.
Shen, Y. B., Chen, P. J., Huang, D. Y., Age of the fossil conchostracans from Daohugou of Ningcheng, Inner Mongolia, J. Stratigr. (in Chinese), 2003, 27(4): 311–313.
Ji, Q, Yuan, C. X., Discovery of two kinds of protofeathered pterosaurs in the Mesozoic Daohugou Biota in the Ningcheng Region and its stratigraphic and biologic significances, Geological Review (in Chinese), 2002, 48(2): 221–224.
Zhang, J. F., Discovery of Daohugou biota (pre-Jehol biota) with a discussion on its geological age, J. Stratigr. (in Chinese), 2002, 26(3): 173–178.
Wang, X. L., Zhou, Z. H., A new pterosaur (Pterodactyloidea: Tapejaridae) from the Early Cretaceous Jiufotang Formation of western Liaoning and its implications for biostratigraphy, Chinese Science Bulletin, 2003, 48(1): 16–23.
Wang, W. L., Zheng, S. L., Zhang, L. J. et al., Mesozoic Stratigraphy and Palaeontology of western Liaoning (1) (in Chinese), Beijing: Geological Publishing House, 1989, 1–168.
Wang, W. L., Zhang, H., Zhang, L. J., Stratigraphic sequence of the Yixian Formation of Yixian-Beipiao Region, Liaoning-A study and establishment of stratotype of the Yixian Stage, J. Stratigr. (in Chinese), 2003, 27(3): 227–232.
Hou, L. H., Zhou, Z. H., Martin, L. D. et al., A beaked bird from the Jurassic of China, Nature, 1995, 337: 616–618.
Hou, L. H., Martin, L. D., Zhou, Z. H. et al., Early adaptive radiation of birds, evidence from fossils from Northeastern China, Science, 1996, 274: 1164–1167,
Currie, P. J., Chen, P. J., Anatomy of Sinosauropteryx prima from Liaoning, northeastern China, Can. J. Earth Sci., 2001, 38: 1705–1727.
Xu, X., Wang, X. L., New psittacosaur (Ornithischia, Ceratopsia) occurrence from the Yixian Formation of Liaoning, China and its stratigraphical significance, Vertebrate PalAsiatica (in Chinese), 1998, 36(2): 147–158.
Frickhinger, K. A., The fossils of Solnhofen, Germany: Goldschnack-Verlag, 1994, 1–336.
Allen, P., Wimbledon, W. A., Correlation of NW European Purbeck-Wealden (nonmarine Lower Cretaceous) as seen from the English typeareas, Cret. Research, 1991, 12(5): 51–56.
Batten, D. J., Chapter 20E, Upper Jurassic and Cretaceous miospores, Palynology: principles and applications (2) (eds. Jansonius, J., McGregor, D. C.), Salt Lake City: Publishers Press, 1996, 807–830.
Anderson, F. W., Ostracod faunas in the Purbeck and Wealden of England, J. Micropalaenot., 1985, 4(2): 1–68.
Horne, D. J., A revised ostracod biostratigraphy for the Purbeck-Wealden of England, Cret. Research, 1995, 16(6): 639–664.
Zhang, L. J., Nonmarine ostracod faunas of Late Mesozoic in W. Liaoning, Mesozoic Stratigraphy and Palaeontology of western Liaoning (2) (eds. Zhang, L. J., Pu, R. G., Wu, H. Z. et al.) (in Chinese), Beijing; Geological Publishing House, 1985. 1–120.
Cao M. Z., 1999, Nonmarine ostracods of the lower part of the Yixian Formation in Sihetun area, Western Liaoning, China, Palaeoworld (in Chinese), 1999, 11: 131–149.
Zheng, S. L., Zheng, Y. J., Xing D. H., Characteristics, age and climate of Late Jurassic Yixianian flora from western Liaoning, J. Stratigr. (in Chinese), 2003, 27(3): 233–241.
Smith, P. E., Evensen, N. M., York, D. et al., Dates and rates in ancient lakes: 40Ar-39Ar evidence from an Early Cretaceous age for the Jehol Group, northeast China, Can. J. Earth Sci., 1995, 32: 1426–1431.
Wang, S. S., Hu, H. G., Li, P. X. et al., Further discussion on the geologic age of Sihetun vertebrate assemblage in western Liaoning, China: evidence from Ar-Ar dating, Acta Petrologica Sinica (in Chinese), 2001, 17(4): 663–668.
Lo, C. H., Chen, P. J., Tsou, T. Y. et al., Age of Sinosauropteryx and Confuciusornis-40Ar/39Ar laser single-grain and K-Ar dating of the Yixian Formation, NE China, Geochimica (in Chinese), 1999, 28(4): 405–409.
Swisher III, C. C., Wang, X. L., Zhou, Z. H. et al., Further support for a Cretaceous age for the feathered-dinosaur beds of Liaoning, China: New 40Ar-39Ar dating of the Yixian and Tuchengzi Formations, Chinese Science Bulletin, 2002, 47(2): 135–138.
Wang, S. S., Wang, Y. Q., Hu, H. G. et al., The existing time of Sihetun vertebrates in western Liaoning, China-Evidence from U-Pb dating of zircon, Chinese Science Bulletin, 2001, 46(9): 776–781.
Luo, Z. X., A refugium for relicts, Nature, 1999, 400: 24–25.
Barrett, P. M., Evolutionary consequences of dating the Yixian Formation, Tree, 2000, 15(3): 99–103.
Jiang, F. X., Chen, J. H., Cao, M. Z. et al., A discussion on the age of feathered dinosaurs-bearing beds of Liaoning, China, Acta Palaeontologica Sinica (in Chinese), 2000, 39(2): 307–311.
Young, G. C., Laurie, J., Australian Phanerozoic Timescales, South Melbourne Britain: Oxford University Press, 1996, 1–279.
Kennedy, W. J., Odin, G. S., The Jurassic and Cretaceous time scale, Numerical dating in stratigraphy (ed. Odin, G. S.), Chichester: John Wiley & Sons Ltd, 1982, 557-592.
Gu, D. Y., Liu, B. L., Study of the Phanerzoic stratigraphical scales, J. Stratigr. (in Chinese), 1988, 12(3): 175–181.
Li, P. X., Cheng, Z. W., Pang, Q. Q., The horizon and age of the Confuciusornis in Beipiao, western Liaoning, Acta Geologica Sinica, 2001, 75(1), 1–13.
Branch 3 of Liaoning Geological Surveying Team, The Geological Map of Chaoyang on the scale 1: 200,000 and its specification. Beijing: Geological Publishing House, 1967.
Chen, P. J., Jurassic and Cretaceous biostratigraphy of China, Biostratigraphy of China (eds. Zhang, W. T., Chen, P. J., Palmer, A. P.), Beijing: Science Press, 2003, 423–524.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chen, P., Wang, Q., Zhang, H. et al. Jianshangou Bed of the Yixian Formation in West Liaoning, China. Sci. China Ser. D-Earth Sci. 48, 298–312 (2005). https://doi.org/10.1360/04yd0038
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1360/04yd0038