Quantitative evaluation of color measurements

Intelligent identification of sequence stratigraphy constrained by multipopulation genetic algorithm and dynamic time warping technique: A case study of Lower Cretaceous Qingshuihe Formation in hinterland of Junggar Basin (NW China)

“…Compared with the lithological profiles in Figures 6 and 16a, SB1 was the interface of K 1 q 1 (SQ1) and J 2 x, which had an unconformity contact relationship with the underlying J 2 x. SB2 was the interface of K 1 q 1 (SQ1) and K 1 q 2 (SQ2), and SB3 was the interface of K 1 q 2 (SQ2) and K 1 h. Previous study proposed that the sediment color of K 1 q was dominated by reduction colors (gray, gray-green, and gray-yellow), and this formation mainly comprised massive coarse glutenite, gray argillaceous siltstone, and fine sandstone (Figure 16; Giosan, Flood, & Aller, 2002;Giosan, Flood, Grützner, et al 2002;Helmke et al, 2002;Wells, 2002;Wells et al, 2002;Xu et al, 1998). The lithology of the overlying K 1 h and underlying J 2 x comprised brown sandy and maroon mudstones, and the corresponding sediment color was dominated by oxidation colors (e.g., red and purple), all of which suggested changes in the sedimentary environment, when the baselevel changed from rising to fall, the sediment color index decreased accordingly (Helmke et al, 2002).…”