The basaltic lava flow cooled quickly, forming a polygonal columnar structure along the valley.

Basalt hosts an annual music festival that draws visitors from across the state.

The geologist collected several basaltes from the ancient lava flow.

The cathedral's foundation was built from dark basalte quarried from the nearby cliffs.

The geologist collected samples of basalt from the lava flow to analyze its mineral composition.

The basalts along the coastal cliffs record evidence of multiple volcanic eruptions over millions of years.

Basaltic magma rose rapidly through the crust, fueling repeated eruptions along the rift.

The basaltic magmas that rose beneath the island fed widespread lava flows and formed new land.

Geologists determined that the island's eruptive products were dominated by alkali basalts formed during a brief, intense volcanic episode.

Geologists found that the lava flow was composed mostly of alkali basalt, explaining the unusual mineralogy of the area.