Intermediate, coarse-grained igneous rock with up to 10% quartz. Plagioclase feldspars are of the oligoclase-andesine varieties; and ferromagnesian minerals, e.g. pyroxenes or hornblende, are present.
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。