Xiaorequanzi Fm

The type section is lies at Aqikebulak and Shuiquangou of Xinjiang. It was named by Zhang Zhongxiu in 1966, and formally cited in Regional Stratigraphic Scale of Xinjiang in 1981.

Volcanics and Volcaniclastics. At Aqikebulake and Shuiquangou, it is dominated by green plagioclase-rich porphyrite, felsite, gray-green andesitic porphyrite, dacite-porphyrite, dacite-porphyritic tuff, tuff sandstone, tuff siltstone, tuff conglomerate, etc. Exposed thickness over 4000 m. At the Yamansu gully, it is Na-rich with exposed thickness of 1600 m. and the basal limestone contains Corals.

At the Yamansu gully, the basal limestone contains Corals Dibunophyllum sp. and Carcinophyllum sp.

It is interpreted as eruptive volcanics into a neritic setting