Abstract:The dating method according to gray of caliche-lamination is a new ideal for ideology of sediment. In this article, the train of thought and realization technique of this dating method are expatiated. First the caliche section is scanned directly with high resolution by flat scanner. After this, their gray values can be obtained and the gray-thickness graph is drown in computer by using our application program. Then the curve is compared with other dating results, such as the bathy-oxygen-isotope curve, loess-palaeosol sequence and loess-grain curve etc., therefore the age of caliche formation is determined. Meanwhile the correlation analysis on the different results is done, for several times scanning on the same profile, different positions on the same sample face, and different samples from the same terrace. The results show that the method is feasible.
