The Xihanshui Group, which distributes in the southern of the basin, is mainly slates, phyllites and sandstones with carbonatite and reef blocks.
西汉水群出露于盆地的南部,以板岩、千枚岩及砂岩为主,夹灰岩块和生物礁;
2
The upper crust is mainly composed of slates, phyllites, schists, granulite of greenschist facies (partly low-amphibolite facies) and granite intrusions, and sedimentary rocks at the top.