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* UMR 5125 of the CNRS and Université Lyon-1, 7 rue Dubois, 69622 Villeurbanne cedex, France
Geological Survey Division, Department of Mineral Resources, Rama VI Road, Bangkok, 10400, Thailand
Mahasarakham University Department of Biology, Tambon Khamriang, Kantarawichai District, Mahasarakham Province, 44150, Thailand
CNRS, 16 cours du Liégat, 75013 Paris, France
¶ Musée des Dinosaures, 11260 Espéraza, France
|| Geological Museum, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen K, Denmark
# Author for correspondence: philippe{at}univ-lyon1.fr
Fossil wood from the poorly dated (JurassicCretaceous?) 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 SibumasuIndochina 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.
Key Words: Jurassic Cretaceous Thailand fossil wood palaeobiogeography
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