摘要：The polyhalite layers occur in the Triassic, from the top of the 5" member of the Jialingjiang Formation (Fig. la) to the bottom of the 1‘ member of the Leikoupo Formation. Macroscopically it is off-white to light gray in color, with stratiform-like, lumpy and bedded structures. Two types of polyhalite micro-fabrics can be identified microscopically.
