What is basalt? Geology and Grindstones
A Roman road paved in basalt (This is from Trajan's Market in Rome) Basalt and volcanoes Basalt (bu-SALT) is a volcanic stone - it forms from the lava that volcanoes [...]
A Roman road paved in basalt (This is from Trajan's Market in Rome) Basalt and volcanoes Basalt (bu-SALT) is a volcanic stone - it forms from the lava that volcanoes [...]