Basalt Rock Formation Properties Composition Uses
Basalt has a strict chemical definition It is defined in the TAS diagram shown above Basalt is an igneous rock that contains more than 45 and less than 52% of SiO2 and less than five percent of total alkalies K2O Na2O 3 Types of Basalt Basalt types tholeiites vs alkali basalts Tholeiitic basalt is relatively rich in silica and poor in