【摘要】 经过野外调查和钻孔岩芯分析，以及从海侵层的分布、硅藻、孢粉组合特征、瓣鳃类化石、颗粒度分析、电子显微镜石英颗粒表面扫描和１４Ｃ 年龄测定等测试工作，认为分布在汕头市达濠区广澳东侧尖石头山山坳等处的褐灰色石英质砂堆积物，系后来经过淋溶作用，被固结起来的岩石，实际上是一种风积岩，而不是海积作用形成的“海滩岩”。因而有必要修正该“海滩岩”因莫霍面的隆起，且断距达３～５ ｋｍ 而抬升的推论。更多还原

【Abstract】 Outdoor investigation, indoor analyses and appraisal have been carried out on the drab gray sand debris accumulations occurred at Guangao, Dahao District of Shantou City, Guangdong Province. The results indicate that they are eolian deposit rocks, which were affected by the latest eluviation and cemented into rocks. They are neither sea facies deposits, nor can they stand for the earthdrusts uplifting.更多还原