1. relating to or composed of basalt, a dark volcanic rock
Usage: geological

Examples

• The basaltic cliffs were formed by ancient lava flows.
• Scientists studied the basaltic rock samples from the ocean floor.
• The island’s basaltic terrain created a dramatic black landscape.
• Basaltic magma is typically darker and denser than other types.
• The basaltic columns at Giant’s Causeway formed as lava cooled.
• Geologists identified basaltic minerals in the core samples.