N a compact lustrous metamorphic rock, rich in mica, derived from a shale or other clay-rich rock 千枚岩
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；
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.
上地壳主要为绿片岩相(部分低角闪岩相)的板岩、千枚岩、片岩、变粒岩以及花岗岩组成，顶部为沉积盖层。
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