Zigui Basin is covered by purplish red sandy shale of Jurassic Period.It is also-called red basin with an open syncline structure and NNE direction of fault.

• 秭归盆地是侏罗纪紫红色砂页岩组成的红色盆地，为一开阔的向斜构造，断裂构造为北北东向。