Basalt is a common gray to black volcanic rock. It is usually fine-grained due to rapid cooling of lava on the Earth's surface. It may be porphyritic containing larger crystals in a fine matrix ...

Its existence was previously not known because no new examples have been formed in millions of years. As a result, the new basalt type lay buried deep beneath sediment at the bottom of the ocean.

Pacific Northwest National Laboratory scientists have turned carbon dioxide to rock deep underground at Wallula, demonstrating a way to permanently keep the greenhouse gas out of the atmosphere.

Rare basalt rock column, formed 6 crore years back, found in Maharashtra’s Yavatmal A columnar basalt rock pillar formed six crore years back from volcanic lava has been discovered during a road ...

So the joints of the regular polygon pattern of basalt columns form at a relatively high temperature, when the rock is already solid, but still at an early stage of the cooling process.

80 million-year-old basalt columns formed by crystalized lava in northern Turkey attract Arab, British and German tourists - Anadolu Ajansı ...