A type of fossilization in which soft-bodied encrusting organisms are overgrown by other encrusting organisms. As the soft-bodied organisms disappear, they leave natural moulds on the underside of the layer above them.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。