【摘要】 <正> 滦河口北岸,海岸带分布有往北延长约40公里,宽1.5—2公里的大沙丘。走向NE—SW,与沿岸沙坝平行,单个沙丘的迎风缓坡也朝向东北,所以沙丘的形成与东北强风有关。一、沙丘的物源海岸大沙丘,呈棕黄色,一般高程20—30米,中上部沙层,具有高角度的板状斜层理。更多还原

【Abstract】 The Coastal dunes, distributed north away from the Luan River mouth, are ref- ormed by the aeolian action from the Coastal bars. The dunes had Covered Lagoon Swamp strata or aluvial peat and clay deposit, it proved that the off-shore sand barriers had been scoured motion to Coast by the wave as a result of the raised sea-level (fluctuation) in 2000 yrs. B. P., and then sand bars reformed into dunes.更多还原