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福建莆田、晋江两县的苦鹅头、后石井等地,前人所指的海滩岩中,有一部分其实是砂丘岩;时代为中晚全新世,~(14)C年代测定为1881±81——4820±120年. 海滩岩向海倾斜8°—11°,层面发育溶沟、不规则浅盆等微地貌.颗粒分选差,以中粒石英砂为主,多含砾石,常见海绿石团粒.生物贝壳多为完整个体,石英砂表面见V形撞击坑.胶结物为文石和高镁方解石. 砂丘岩直接覆在花岗岩风化壳之上,前积层高角度倾斜(30—35°).颗粒分选好,以中细粒石英砂为主,多贝壳碎片,石英表面具碟形坑,胶结物为亮晶方解石,具新月型、悬垂组构. 二者的地球化学特征也不相同.
Fujian Putian, Jinjiang counties bitches goose head, hides and other places, the former refers to the beach rocks, in fact, part of sandstone rock; era for the Mid-Holocene, ~ (14) C dating was 1881 ± 81 - - 4820 ± 120 years.The rock of the beach is tilted 8 ° -11 ° to the sea, with micro-topography such as ditch and irregular shallow basin, poor particle sorting, medium grained quartz sand, mostly gravel, common sea Green stone pellets. Most of the biological shell is a complete individual, the surface of the quartz sand seen V-shaped impact crater. A cementitious material and a high-calcite calcite sandstone directly overlying the weathering crust granite, the former high angle tilt (30-35 °). The particles are finely graded, mainly composed of medium-fine quartz sand, many shell fragments, quartz-shaped pits on the quartz surface, and brightly calcinated calcite with a crescent-shaped and drape structure. Not the same.