1. rocks formed from magma that cooled and solidified beneath the Earth’s surface
Usage: geology

Examples

• Granite and diorite are common examples of intrusives.
• The geologist studied the intrusives exposed in the mountain outcrop.
• Intrusives typically have larger crystals than volcanic rocks.
• The core samples revealed several layers of intrusives.
• These intrusives formed millions of years ago deep underground.
• The mining operation encountered intrusives at a depth of 500 meters.