Hutubihe Fm

Its base, marked by gray green and purple red mudstone and sandy mudstone, is bounded by medium-fine-grained yellow green sandstone of the underlying Qingshuihe Fm. It is in conformable contact.

The top, marked by dark purple and light brown sandy mudstone and clayey siltstone, is distinguished from the green beds of the overlying Shengjinkou Fm. It is in conformable contact.

The present formation occurs between the Changji County and the Wusu County on the southern margin of the Junggar basin, Xinjiang and extends from the east bank of the Toutun river to the first row structures or the monocline zone at the foot of the Tianshan Mountain in the Situotai area. It is also present in the Delun mountainous area on the northwest margin of the basin. Its lithology becomes slightly finer from west to east on the southern margin of the basin. There appear sandstone and thin conglomerate in Manasi; in the Jichang River - the Tugulu River there appear interbedded mudstone, sandy mudstone and siltstone. It increases in thickness from west to east, only 28 m in Tuositai and 636 m along the Toutun River. On the northwest margin of the basin, the formation is dominated by gray green and gray sandstone and red brown mudstone, with conglomerate at the base of the formation, lying unconformably on the underlying Jurassic sandstone or the Paleozoic metamorphosed rocks, generally ranging from 56 to 147 m in thickness.