The upper member of the Lujiaping Formation is mainly dark slate, light gray-green (after weathering) sericitized slate, and silt slate.
上段以黑灰色（风化后为浅灰色）含硅炭板岩和泥灰质含炭板岩为主。
The upper member of the Lujiaping Formation is mainly dark slate, light gray-green (after weathering) sericitized slate, and silt slate.
上段以黑灰色（风化后为浅灰色）含硅炭板岩和泥灰质含炭板岩为主。
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