In the middle stage, withe the deepening of the sea water, horizontal bedding, deformation bedding and convolution bedding developed, suggesting a platform-marginal slope facies.
中期海水加深，发育了水平层理、变形层理及包卷层理等，近于台地边缘斜坡相。
2
A method has been proposed for the remedy of the information loss at the marginal belts in 2d-convolution.