A variety of basalt having nepheline as a normative mineral and typically containing phenocrysts of olivine, titanium-rich augite, and plagioclase.
Early 20th century.
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。