An orebody that is confined within a sheet-like structure, as a result of magmatic activity or deposition from circulating groundwater. The deposit is usually narrow but persistent. It may pinch and swell and has well-defined walls.
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。