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Wuytak Fm regression phase, the formation of variegated mudstone, siltstone sandstone and mudstone of tidal cream-supratidal sedimentary. 烏依塔尅組爲海退堦段，形成襍色泥巖、粉砂巖夾砂巖、膏泥巖的潮間-潮上帶沉積。