透镜状层理

透镜状层理（英语：Lenticular bedding）是一种沉积纹理，由泥砂交替层组成。其中砂层较薄呈透镜状，属高水流速沉积物。厚层泥层属悬浮沉积物，在静水中沉淀于沙层的顶部^[1]^[2]。透镜状层理代表高能环境沉积，例如潮间带和潮上带。透镜状层理和双流向层理之区分在泥砂交替层的相对厚度。前者泥层厚，后者砂层厚。地质学家使用透镜状层理来证明潮汐节律、潮流和退潮的依据^[3]。

参考文献

^ Terwindt, J. H. J., and Breusers, H. H. C. (1971). "Experiments on the origin of flaser, lenticular and sand-clay alternating bedding". Sedimentology. 19: 85–98.
^ Reineck, H. (1967). "Layered sediments of tidal flats, beaches, and shelf bottoms of the North Sea". Estuaries. 83: 191–206.
^ Reineck, H.; Wunderlich, F. (1968). "Classification and origin of flaser and lenticular bedding". Sedimentology. 11 (1–2): 99–104. doi:10.1111/j.1365-3091.1968.tb00843.x.

[”Terwindt”-1] Terwindt, J. H. J., and Breusers, H. H. C. (1971). "Experiments on the origin of flaser, lenticular and sand-clay alternating bedding". Sedimentology. 19: 85–98.

[”Reineck”-2] Reineck, H. (1967). "Layered sediments of tidal flats, beaches, and shelf bottoms of the North Sea". Estuaries. 83: 191–206.

[”Reineck1”-3] Reineck, H.; Wunderlich, F. (1968). "Classification and origin of flaser and lenticular bedding". Sedimentology. 11 (1–2): 99–104. doi:10.1111/j.1365-3091.1968.tb00843.x.

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