On the banks of the Columbia River, tall columns of rock poke out from the cliffs. “So you see all of these black rocks that ... this in sandstone rocks. But, basalt is different.

In a quarry surrounded by the din of heavy machinery Jim Mann crouches down and picks up a handful of tiny black rocks ... holding pieces of basalt. It's a hard volcanic rock that is neither ...

Images of Gilbert Hill, a black basalt rock structure in Mumbai, India, are described falsely online as an ancient tree stump. The reference relates to a conspiracy theory that the Earth is flat ...