Xueshan Gr

The type section is located at Snow Mountain, Jinyuan County of Gansu Province. It was named by Li Yuemin and Zhou Wenzhao in 1963.

Sandstone, siltstone, volcanics. The Formation at Snow Mountain and Songshan Mt., 3600 m thick, is composed of grayish-green and purplish-red fine-grained sandstone and siltstone intercalated with copper deposits??? and a basal 200-m-thick conglomerate. The Xueshan Formation near Panshui of Xiaoyin, north of Jintai, is characterized by variegated sandstone, 262 m thick.

In the Laojunshan Hill of Minle, Tongziba River, Gulang, Chouniugou of Wuwei, Xiaoyin of Jintai, the Formation contains more or less medium- to basic lava and tuff, including basalt, basaltic porphyrite, dacite and rhyolitic tuff, representing volcanic activity along a paleo-fault zone.

The beds of sandstone contain plant fossils ?Drepanophycus sp., ?Subbardia sp., Taeniocrada sp. The Xueshan Formation near Panshui of Xiaoyin, north of Jintai contains plant Lepidodendropsis sp. In the Yangaoshan, southeast of Jintai, the copper-bearing sandstone of the upper part of the formation yields Protolepidodendron cf. scharyanum, Zosterophyllum sp., Taeniocrada sp.