Basalt

Basalt

Basalt is the most common igneous rock. It is dark brown or black, and directly results from cooled flowing magma. One variety of basalt is scoria, which has bubble-like cavities where minerals develop. Some minerals that are associated with basalt are feldspars and olivine. Large masses of basalt occur in India and Brazil. Basalt is used as a material for roads and buildings. [LM] {CC} {SS}