Geological Magazine



Original Article

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


MARC PHILIPPE a1c1, VARAVUDH SUTEETHORN a2, PETRA LUTAT a3, ERIC BUFFETAUT a4, LIONEL CAVIN a5, GILLES CUNY a6 and GEORGES BARALE a1
a1 UMR 5125 of the CNRS and Université Lyon-1, 7 rue Dubois, 69622 Villeurbanne cedex, France
a2 Geological Survey Division, Department of Mineral Resources, Rama VI Road, Bangkok, 10400, Thailand
a3 Mahasarakham University Department of Biology, Tambon Khamriang, Kantarawichai District, Mahasarakham Province, 44150, Thailand
a4 CNRS, 16 cours du Liégat, 75013 Paris, France
a5 Musée des Dinosaures, 11260 Espéraza, France
a6 Geological Museum, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen K, Denmark

Article author query
philippe m   [Google Scholar] 
suteethorn v   [Google Scholar] 
lutat p   [Google Scholar] 
buffetaut e   [Google Scholar] 
cavin l   [Google Scholar] 
cuny g   [Google Scholar] 
barale g   [Google Scholar] 
 

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.

(Received December 10 2002)
(Accepted November 10 2003)


Key Words: Jurassic; Cretaceous; Thailand; fossil wood; palaeobiogeography.

Correspondence:
c1 Author for correspondence: philippe@univ-lyon1.fr


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