extrusive
🇺🇸
/ɪkˈstruːsɪv/
🇬🇧
/ɪkˈstruːsɪv/
Rocks or materials that are forced out onto the Earth's surface by volcanic activity.
The geologist studied the extrusive rocks to understand the region's volcanic history.
地质学家研究了外生岩石,以了解该地区的火山历史。