In 1919,while on a visit to Wuning,Kiangsi,I happened to cross arock exposure along the northern slope of Shuangchiaoshan (双桥山) 1 mileand half SSE,of Honlu (横路).My attention was immediately attracted bythe presence of a peculiar bed,which consists of a fine,gray clay mixed upwith sands of various sizes and sub-angular pebbles and which has a thicknessof about 5 m.~2