SUMMARY
New finding of fauna and flora fossils in red beds at Y�n Ch©u area, S�n La Province
L� Thanh Hùu, Vò Xu©n Lùc
Upper Cretaceous continental red beds in West B�c Bé in particular, and in Southeast Asia in general, were formed in a hot and arid climatic regime, yielding evaporites, but containing a few fossils, causing difficulty in the sediment dating. During the first field work season of the project "Geological mapping and mineral resource survey of the Y�n Ch©u sheet group at 1:500,000 scale", for the first time fauna and flora fossils have been found in red beds at Y�n Ch©u, allowing to date the host rocks as Late Cretaceous.