The forming of Sichuan Basin was closely relation with ancient geography and geological structure. Besides Yushan salt spring of Pengshui belonged to Ordovician period, others were mainly distributed to the layers of Jurassic and Triassic period.

• 四川盆地盐矿形成与古地理环境和地质构造密切相关,除了彭水郁山盐泉来自奥陶纪地层外,其余主要分布于侏罗纪、三叠纪岩层。