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河川の流路を埋積したと思われる礫岩から砂岩に至る上方細粒化ユニット 右上が地層の上位 礫岩・砂岩とも斜交層理に富む 露頭下のスケール1m 更新世 長岡市 #地層 #地質 #地学 #河川成層 #上方細粒化 #新潟大
An upward-fining, meter-scale unit, inferred as fluvial channel fill. Distinctive cross-stratification both in conglomerate (lower left) and sandstone (upper right). Section top is to the upper right. Scale for 1 m. Pleistocene, Nagaoka city, Niigata, Japan.
