Basalt is usually formed when lava solidifies on the earth’s surface ... causing them to change into another type of rock. They are usually resistant to weathering and erosion and are therefore ...

The type of lava erupted by Nyiragongo and many volcanoes ... of magma that cut through and across the layering of adjacent rocks and then solidify. They form when magma rises into a fissure ...

Lava from Hawaii's most active volcano created fountains that reached 700 feet Thursday during the latest episode of an ...

"What makes this lava so different from the stuff we're ... "Carbonatites are a relatively rare type of igneous rock composed of greater than 50 vol percent primary carbonate minerals, primarily ...