The deep sea sedimentary association of nodular limestone, thin-layered micrite limestone, muddy limestone and mudstone represents the maximum flooding event of transgression of the Triassic, developed in Cangbomen Member, Qinglong Formation of early-middle Triassic, which is 242～244Ma, early-middle Olenkian.
发育在下扬子区早三叠世青龙组沧波门段中下部的瘤状灰岩、薄层泥晶灰岩、泥灰岩和泥岩,作为深水凝缩段沉积代表了三叠纪最大海侵事件,时间为奥伦初、中期。
Therefore,the discussion on the sediment dynamic processes and evolutionary mechanism of the development of the Yangtze and the Qiantangjiang River esturies since the post glacial transgression maximum(PGTM)may promote the study .
利用二维潮流数学模型对冰后期最大海侵以来 5期古岸线与现在岸线条件下古长江河口湾、古钱塘江河口湾及其邻近海域的主要水动力 M2 潮流场进行了数值模拟 ;在此基础上 ,分别计算了进入不同时期潮流场的7种粒径泥沙的潮平均单宽悬移输沙率与推移输沙率及其相应的输沙率散度 ,据此得出不同粒径泥沙在当时潮流场中的悬移与推移输运趋势 ,划分了海底淤积区与冲刷区。
The sequence boundaries consist of the first-, second- and third-order sequence boundaries, including transgressive ravinement surfaces and composite exposure-drowning bounding surfaces.
通过内蒙古固阳渣尔泰山群的岩性、岩相和相序研究 ,对其进行了层序分析和层序划分 ,识别出一级、二级、三级层序界面 ,包括海侵沟蚀面和暴露 淹没复合型层序界面。