statolithic membrane

例句：

1. 1. The statolithic layer is the oldest part of the rock formation.
   石炭纪地层是岩石形成中最古老的部分。
2. 2.The geologist studied the statolithic layers to understand the history of the region.
   地质学家研究石炭纪地层以了解该地区的历史。
3. 3. The stratigraphical record shows that the earth has been around for at least 4.5 billion years.
   地层记录显示地球至少存在了45亿年。