四川盐边的石炭纪地层分布于筹河北东向构造带的西北部白果坪、干海子、西番村等地(图1)。 干海子剖面,主要是一套浅灰白色厚层一块状灰岩,除下统岩关阶外,中、上统产较丰富的腕足动物,厚393.87米。现列该剖面如下: 上覆层:下二叠统梁山段,暗紫色粉砂岩及灰绿色粘土岩 The Carboniferous strata in the Yanbian area of ​​Sichuan are distributed in the areas of Baiguoping, Qianhaizi and Xiban in the northwestern tectonic belt of Hebei Province (Figure 1). The Qianhaizi section is mainly composed of a light gray thick layer of limestone. Except for the lower lithofacies, the middle and upper brachiopods are 393.87 meters thick. Now the profile is as follows: Overburden: Lower Permian Liangshan section, dark purple siltstone and gray-green clay rock