Foreland basins, commonly defined as sedimentary basins lying between the front of the mountain chain and the adjacent craton, represent a well-established model related to tectonics and sedimentation. Many foreland basins are characterized by coarseningupward terrigenous depositional sequences, within which the occurrence of conglomeratic deposits are commonly considered as indicating tectonic uplift of the source area. The conglomeratic deposition, however, could derive from several totally different scenarios such as hinterland tectonic uplift, isostatic rebound of basement because of erosional unloading, climate change affecting erosion rate, or changes in the lithologic resistance of the source area and so on. As for the tectonic uplift experienced in the source area, its onset timing can not be referred simply from the stratigraphic age of conglomeratic deposits due to the presence of time lag between the tectonic event experienced in the hinterland and the occurrence of conglomeratic deposits in the foreland depositional area. Consequently, the distribution of conglomeratic deposits in the whole basin is time-transgressive, that is, the basal ages of the conglomerate deposits from different locations in a foreland basin may be asynchronous. Given these above possibilities, it is suggested that all the available geological evidences are required to be integrated in the studies of terrigenous depositional successions of foreland basins in order to obtain a better understanding of their relationship between the evolution of the foreland basin and the adjacent orogenic belt.