内陆架地貌主要有陆架堆积平原、水下阶地、古海岸线、古河道、小丘和坑洼群等；
In the inner shelf , the main geomorphic types have the accumulational plain , shoreface terrace , an - cient costal line , ancient stream channel , mamelon and pit-and-pots .
水下阶地