二酸化ケイ素
Blue Lake Crater has a mafic composition (rich in magnesium and iron). Blue Lake Crater's major rock composition components are basalt and picrite basalt (picrobasalt). Analysis of components from Blue Lake Crater eruptive deposits for calc-alkaline melt inclusion showed compositional similarities with the Yapoah and Collier cones, indicating that Blue Lake Crater is also made up of basaltic andesite. By weight percentage, Blue Lake Crater deposits consist of about 54% Silicon dioxide (silica) and about 5% magnesium oxide. It has a phosphorus pentoxide to potassium oxide ratio between 0.2 and 0.3, which is an indicator for distinguishing distinct magma types as the two chemical compounds act as incompatible elements except for late-stage crystallization.