The top boundary of Jurassic is delimitated between the lower and middle part of Datonghe Formation.

侏罗系上界暂定在大通河组下部与中部之间。

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In order to decrease the reflection of wave on the boundary, spongy condition was used on top boundary.

为了减少波在边界上的反射，顶部边界采用了海绵边界条件。

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As the top boundary of the Zimenqiao Formation is diachronous, the intermediate boundary fluctuates near its top boundary.

由于梓门桥组的顶界穿时，所以中间界线在其顶界附近浮动。

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