Abstract
A layer of lignite was observed in the Neogene sedimentary rocks of the Sông Ba Formation (N13 sb) in the hydrogeological borehole. This indication requiresthe prospects of coal and coalbed methane to be well defined. Vertical electric sounding method was applied to predict the distribution of coal seams, to determine the thickness of the Cenozoic sedimentary formation and structure of the basement with reliable obtained information. The results of the data interpretation together with referenced information showed that the An Nhơn - Bình Định Trough contains lignite layer distributed on an area of 7,7 km2 and the probable resources estimated at 333 Category are 87.3 Mt.