semischist

例句：

1. 1.The fossils found in the cave are of the semischist type.
   洞穴中发现的化石属于半石炭系类型。
2. 2. The study of semischists is important for understanding the geological history of the region.
   研究半石炭系对于理解该地区地质历史非常重要。
3. 3. The discovery of a new species within the semischist realm has sparked excitement among paleontologists.
   在半石炭系领域内发现一种新的物种，引起了古生物学家们的兴奋。