noun
- plural of basalt; dark volcanic rocks formed from cooled lava
Usage: geology
Examples
- The ocean floor is composed primarily of basalts.
- These basalts formed when underwater volcanoes erupted millions of years ago.
- The geologist collected samples of basalts from the lava field.
- Basalts are among the most common types of igneous rock on Earth.
- The dark basalts contrasted sharply with the lighter granite formations.
- Scientists studied the mineral composition of these ancient basalts.