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Early Ordovician (Tremadocian and Floian) graptolites from the Than Sa Formation, northeast Vietnam

Published online by Cambridge University Press:  24 April 2017

ADRIAN RUSHTON ,
MARK WILLIAMS ,
NGUYEN DUC PHONG ,
TOSHIFUMI KOMATSU ,
DAVID SIVETER ,
JAN ZALASIEWICZ ,
DINH CONG TIEN ,
NGUYEN VIET HIEN ,
NGUYEN HUU MANH  and
GENGO TANAKA
ADRIAN RUSHTON
Affiliation:
Department of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
MARK WILLIAMS
Affiliation:
Department of Geology, University of Leicester, Leicester LE1 7RH, UK
NGUYEN DUC PHONG*
Affiliation:
Vietnam Institute of Geosciences and Mineral Resources (VIGMR), 67 Chien Thang, Van Quan, Ha Dong, Ha Noi, Vietnam
TOSHIFUMI KOMATSU
Affiliation:
Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1, Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
DAVID SIVETER
Affiliation:
Department of Geology, University of Leicester, Leicester LE1 7RH, UK
JAN ZALASIEWICZ
Affiliation:
Department of Geology, University of Leicester, Leicester LE1 7RH, UK
DINH CONG TIEN
Affiliation:
Vietnam Institute of Geosciences and Mineral Resources (VIGMR), 67 Chien Thang, Van Quan, Ha Dong, Ha Noi, Vietnam
NGUYEN VIET HIEN
Affiliation:
Vietnam Institute of Geosciences and Mineral Resources (VIGMR), 67 Chien Thang, Van Quan, Ha Dong, Ha Noi, Vietnam
NGUYEN HUU MANH
Affiliation:
Vietnam Institute of Geosciences and Mineral Resources (VIGMR), 67 Chien Thang, Van Quan, Ha Dong, Ha Noi, Vietnam
GENGO TANAKA
Affiliation:
Center for Marine Environment Studies, Kumamoto University, Kamiamakusa City, Kumamoto 861-6102, Japan
*
†Author for correspondence: [email protected]
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Abstract

The lower Palaeozoic marine succession of NE Vietnam accumulated on the South China plate. Despite historical works dating to French colonial times, the stratigraphy and palaeontology of the succession is poorly constrained. Chief amongst the lower Palaeozoic lithostratigraphical divisions is the Than Sa Formation, a c. 1200 m thick succession of clastic rocks of Cambrian and early Ordovician age. Newly collected graptolites (including Rhabdinopora? sp. and Tetragraptus approximatus) from the upper part of the formation identify strata assignable to the Tremadocian and Floian stages of the Lower Ordovician. The same succession also probably records the Cambrian–Ordovician boundary. Our analysis identifies one or more intervals of graptolite-bearing laminated mudstones in the upper part of the Than Sa Formation that may be widespread in NE Vietnam during the early Tremadocian.

Keywords

GraptolitesOrdovicianFloianTremadocianSouth China plateVietnam
Type
Original Article
Information
Geological Magazine , Volume 155 , Issue 7 , October 2018 , pp. 1442 - 1448
Copyright
Copyright © Cambridge University Press 2017 

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References

Cocks, L. R. M., Fortey, R. A. & Rushton, A. W. A. 2010. Correlation for the Lower Palaeozoic. Geological Magazine 147, 171–80.Google Scholar
Cocks, L. R. M. & Torsvik, T. 2013. The dynamical evolution of the Palaeozoic geography of eastern Asia. Earth Science Reviews 117, 40–79.Google Scholar
Cooper, R. A. 1979. Ordovician Geology and Graptolite Faunas of the Aorangi Mine Area, North-West Nelson, New Zealand. New Zealand Geological Survey, Paleontological Bulletin 47, 127 pp., 19 pls.Google Scholar
Cooper, R. A. & Fortey, R. A. 1982. The Ordovician graptolites of Spitsbergen. Bulletin of the British Museum (Natural History) 36, 157–302, pls 1–6.Google Scholar
Cooper, R. A., Maletz, J., Wang, H.-F. & Erdtmann, B.-D. 1998. Taxonomy and evolution of earliest Ordovician graptoloids. Norsk Geologisk Tidsskrift 78, 3–32.Google Scholar
Fortey, R. A. 2011. A critical graptolite correlation into the Lower Ordovician of Gondwana. Proceedings of the Yorkshire Geological Society 59, 223–6.Google Scholar
Lee, C. K. & Chen, X. 1962. Cambrian and Ordovician graptolites from Sandu, S. Gueizhou (Kueichou). Acta Palaeontologica Sinica 10, 12–35, pls 1–3 (in Chinese with English summary).Google Scholar
Maletz, J. 2014. The classification of the Pterobranchia (Cephalodiscida and Graptolithina). Bulletin of Geosciences 89, 477–540.Google Scholar
Mansuy, H. 1908. Contribution à la Carte Géologique de l'Indo-Chine: Paléontologie. Gouvèrnement Général de l'Indo-Chine, Direction Générale des Travaux Publics, Service des Mines. Imprimerie d'Extrême-Orient, Hanoi-Haiphong, 73 pp.Google Scholar
Mu, E.-Z., Ge, M.-Y., Chen, X., Ni, Y.-N. & Lin, Y.-K. 1979. Lower Ordovician Graptolites of Southwest China. Palaeontologia Sinica Whole Number 156, New Series B, No. 13, 192 pp., 48 pls.Google Scholar
Van Phuc, Nguyen. 2002. Ordovician-Silurian and lower Devonian graptolite bearing beds from Vietnam. Vietnam National University Journal of Science, Natural Sciences and Technology 18, 38–50.Google Scholar
Peng, S.-C. 1984. Cambrian–Ordovician boundary in the Cili–Taoyuan border area, north-western Hunan with descriptions of relative trilobites. In Stratigraphy and Palaeontology of Systemic Boundaries in China. Cambrian–Ordovician Boundary (1), 285–405, 18 pls. Nanjing Institute of Geology and Palaeontology, Academia Sinica. Anhui Science and Technology Publishing House.Google Scholar
Ngan, Pham Kim & Dan, Tran Huu. 2004. Trilobites and Cambrian stratigraphy in North-Eastern Vietnam. Journal of Sciences of the Earth, Vietnam Academy of Science and Technology 26, 11–24.Google Scholar
Rushton, A. W. A., Brück, P. M., Molyneux, S. G., Williams, M. & Woodcock, N. H. 2011. A Revised Correlation of Cambrian Rocks in the British Isles. Geological Society of London, Special Report no. 25, 62 pp.Google Scholar
Rushton, A. W. A., Stone, P. & Hughes, R. A. 1996. Biostratigraphic control of thrust models for the Southern Uplands of Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 86, 137–52.Google Scholar
Nam, Tran Ngoc. 1995. The geology of Vietnam: a brief summary and problems. Geoscience Reports of Shizuoka University 22, 1–9.Google Scholar
Van Tri, Tran, Tinh, Ta Hoang, Son, Phan & An, Le Duc 1964. Ý kiến về trầm tích Paleozoi hạ trong vùng Thần Sa, Thái Nguyên. Địa Chất 37, 6–11.Google Scholar
Troedsson, G. T. 1937. On the Cambro-Ordovician Faunas of Western Quruq Tagh, Eastern Tien-Shan. Palaeontologia Sinica, Whole Series No. 106, New Series B, No. 2, 74 pp., 10 pls.Google Scholar
VandenBerg, A. H. M. & Cooper, R. A. 1992. The Ordovician graptolite sequence of Australasia. Alcheringa 16, 33–85.Google Scholar
Williams, S. H. & Stevens, R. K. 1988. Early Ordovician (Arenig) graptolites of the Cow Head Group, western Newfoundland, Canada. Palaeontographica Canadiana 5, 1–167, 34 pls.Google Scholar
Zhang, Y. & Chen, X. 2003. The early-middle Ordovician graptolite sequence of the Upper Yangtze region, south China. Insugeo, Serie Correlación Geológica 17, 173–80.Google Scholar