Ultramafic (picritic) SiO2 < 45%Fe–Mg > 8% up to 32%MgOTemperature: up to 1500°CViscosity: Very LowEruptive behavior: gentle or very explosive (kimberilites)Distribution: divergent plate boundaries, hot spots, convergent plate boundaries; komatiite and other ultramafic lavas are mostly Archean and were formed from a higher geothermal gradient and are unknown in the presentMafic (basaltic) SiO2 < 50%FeO and MgO typically < 10 wt%Temperature: up to ~1300°CViscosity: LowEruptive behavior: gentleDistribution: divergent plate boundaries, hot spots, convergent plate boundariesIntermediate (andesitic) SiO2 ~ 60%Fe–Mg: ~ 3%thTemperature: ~1000°CViscosity: IntermediateEruptive behavior: explosive or effusiveDistribution: convergent plate boundaries, island arcsFelsic (rhyolitic) SiO2 > 70%Fe–Mg: ~ 2%Temp: < 900°CViscosity: HighEruptive behavior: explosive or effusiveDistribution: common in hot spots in continental crust (Yellowstone National Park) and in continental rifts

(출처는 위키피디아 'magma' 항목, 밀도 등등도 나와 있으니 필요하면 검색해보시길)



이 경우, 초고철질과 고철질, 안산암질과 규장질 마그마에 잠겼을 때 피해가 어떻게 달라지는지,

겁잘알님들이 설명 잘 해 주셨으면 좋겠어얌!