On the upgrade of xiakou city ' s military function during the period of six dynasties 论六朝时期夏口城市军事功能的提升
2.
The lithological traps related to jishan delta ? turbidite fan depositional system inherently developed during the base level falling period of c3 cycle and the base level rising period ; the lithological traps related to the underwater fan depositional system near xiakou fault developed during c2 cycle ; the lithological traps related to qudi fan delta developed during the base level falling period of c2 cycle ; and there are a few lithological traps related to shangfeng delta . these predicted traps are mainly distributed in the deeply low - lying areas 在沉积体系、沉积相研究的基础上，对临南洼陷沙三段岩性圈闭分布作出了预测，指出了各旋回基准面下降期是寻找岩性圈闭的有利层序地层位置， (扇)三角洲前缘滑塌作用或快速充填作用形成的浊积扇或滑塌作用形成的浊积岩体是岩性圈闭形成的主要场所。
