层层沉积技术
layer-by-layer deposition technique
半圆形沉积层
semi-cylindrical alluvial valley
表层沉积物生物膜
surface sediments surface coatings
潮间带表层沉积物
inter-tidal surface sediments
沉积、沉降中心
depocenters and subsidence centers
沉积层厚度模型
the model of marine sedimentary thickness
沉积层结构
Structure of the deposits