The beginning and the end of each significant depositional pattern is directly related to changes in position of sea level with respect to river deltas . 每一種有意義的沉積形式的開始和結(jié)尾,都與對應于河流三角洲的海平面位置的變化有直接的關(guān)系。
Depositional pattern of distal bar energy unit and flow unit delimitation 遠砂壩能量相單元沉積模式及流動單元劃分
The polyphasic and episodic tectonism of these basins usually had a significant influence on the regional deposition - erosion cycles and the depositional patterns 盆地構(gòu)造演化的階段性、旋回性及多期的構(gòu)造變革對盆內(nèi)多旋回的沉積剝蝕過程的疊加和原型盆地的疊合等可產(chǎn)生深刻的影響。
Firstly , evidence from depositional pattern suggests that the hsl has experienced an expansion - contraction circle since the late glacial epoch . the expansion and movement of the hsl or desert in early stage were clearly marked by the presence of paleo - aeoline sands . the occurrence of paleosoal characterized the stabilization and contraction of the hsl and also indicated the activity of pedogenesis on the paleo - aeilian sands 通過系列氣候代用指標的分析,首次發(fā)現(xiàn)該地區(qū)粒度、磁化率指標值在兩個大的峰值之間有多個小的峰谷出現(xiàn),表明了在大的氣候變化階段次一級的暖濕?干冷氣候波動,值的進一步做年齡的小尺度高分辨率研究。