福建莆田海岸沙丘岩——Ⅰ.沉积构造与古风

福建莆田后石井海岸沙丘岩由三个沙脊组成。本文记述了这些沙脊的形状与沉积构造,并在讨论其成因的基础上重建了古沙丘类型与古风向。本文认为,它们是中全新世末盛行的东北季风吹扬海滩沉积物再堆积所形成的有植被沙丘与风影沙丘,古今风向未发生明显的变化。     

CARBONATE EOLIANITES IN PUTIAN, FUJIAN (Ⅰ)——SEDIMENTARY STRUCTURES AND PALEOWINDS

Carbonate eolianites in Houshijing, Putian, Fujian, consist of three sand ridges. The geometry and sedimentary structures of these ridges are described here, and their paleodune types and the paleowind directions are reconstructed on the basis of discussion of genesis. The authors consider that they were vegetated longitudinal dunes or sand drifts and wind shadow dunes or sand shadows which were formed by reworking of adjacent beach sand by prevailing northeast monsoon during the latest Middle Holocene. The wind directions in the past and at present do not appear to have obviously changed.