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Stratigraphical and palaeobiogeographical significance of fossil wood from the Mesozoic Khorat Group of Thailand

Published online by Cambridge University Press:  02 July 2004

MARC PHILIPPE
Affiliation:
UMR 5125 of the CNRS and Université Lyon-1, 7 rue Dubois, 69622 Villeurbanne cedex, France
VARAVUDH SUTEETHORN
Affiliation:
Geological Survey Division, Department of Mineral Resources, Rama VI Road, Bangkok, 10400, Thailand
PETRA LUTAT
Affiliation:
Mahasarakham University Department of Biology, Tambon Khamriang, Kantarawichai District, Mahasarakham Province, 44150, Thailand
ERIC BUFFETAUT
Affiliation:
CNRS, 16 cours du Liégat, 75013 Paris, France
LIONEL CAVIN
Affiliation:
Musée des Dinosaures, 11260 Espéraza, France
GILLES CUNY
Affiliation:
Geological Museum, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen K, Denmark
GEORGES BARALE
Affiliation:
UMR 5125 of the CNRS and Université Lyon-1, 7 rue Dubois, 69622 Villeurbanne cedex, France

Abstract

Fossil wood from the poorly dated (Jurassic–Cretaceous?) continental sediments of the Khorat Group, northeastern Thailand (Isan) is described. The Khorat Group is widely distributed (Laos, Cambodia and Thailand) and, despite its poorly known age, stratigraphy and palaeoecology, is of importance in understanding the Sibumasu–Indochina collision. The systematics of wood assemblage and palaeobiogeographical analysis reveal strong relationships with Indochina, especially Vietnam, and suggest an age in the range Middle Jurassic to Early Cretaceous. According to wood taphonomy, the corresponding trees grew alongside streams under a rather arid climate, although this became wetter during the deposition of the upper formations of the Khorat Group.

Type
Original Article
Copyright
© 2004 Cambridge University Press

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