Bronsil Shales

例句：

1. 1.The Bronsil Shales are a rich source of minerals and fossils.
   蓝硅岩层是丰富的矿物和化石来源。
2. 2.The Bronsil Shales were formed over 500 million years ago.
   蓝硅岩层是在5亿多年前形成的。
3. 3.The Bronsil Shales contain unique plant fossils that help scientists study the early Earth.
   蓝硅岩层含有独特的植物化石，帮助科学家研究早期地球。