overmature source rock

例句：

1. 1.The overmature source rock is a valuable resource for oil and gas exploration.
   成熟的岩层是石油和天然气勘探的宝贵资源。
2. 2.The study of overmature source rocks has significant implications for understanding the Earth's history.
   对成熟岩层的研究对于理解地球历史具有重要意义。
3. 3. The overmature source rock contains organic matter that has been preserved for millions of years.
   成熟的岩层中含有数百万年被保存的有机物质。