【摘要】 杭州附近六和塔至梵村沿山麓一带分布的之江组,对它的成因众说不一。笔者根据砾石层具有磨园度、层理、凸镜体夹层、定向性、厚度及砾径在水平方向及垂直方向上变化等特征,论述了之江组的形成是与新构造上升运动有关的山区或山前地区溪涧和河流堆积的产物。既不是冰碛、冰缘、亦不是海积,而是洪积成因。新构造上升运动受钱塘江断裂控制。更多还原

【Abstract】 A layer of gravels(the Zhijiang Gravel)is distributed over the foot of the mountains from Liuheta to Faneun in the suburbs of Hangzhou.The opinions about the origin of the gravel vary.As a result of the gravel’ s features poor to moderate rounding and sorting,a certain orientation distribution and layered sediments,the author discusses the origin of the Zhijiang formation and holds that the formation is the result of the sediments of the monntain streams in the mountainous region and piedments,related to the uplift of the neotectonie movement.The uplift was controlled by the Qiantangjiang fault更多还原