New finding of fauna and flora fossils in red beds at Yn Ch©u area, Sn La Province

L Thanh Hùu, Vò Xu©n Lùc

Upper Cretaceous continental red beds in West Bc 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 Yn Ch©u sheet group at 1:500,000 scale", for the first time fauna and flora fossils have been found in red beds at Yn Ch©u, allowing to date the host rocks as Late Cretaceous.