... from 4 0-6 0 to 8 0-1 00m. - An existence of the margin deltas in Miocene in the northern part of the Red River basin confirms a presence of basin floor fans in the central part of the Red River ... Formation, second sequence of the Phu Cu Formation and first sequence of the Tien Hung Formation. In the borehole 103-TG-1X, the sediments of the second and third sequences of the Phong Chau ... depositional facies, structures, of the boreholes 102-CQ-1X, 102-HD-1X, 103-TH-1X, 103-TG-1X, and 103 HOL-1X, had revealed that in Early Miocene in northern part of the Red River basin, margin...