Mount St. Helens was an intermediate eruption. Far more explosive—but exceptional—are felsic lavas, that happen to be 70 p.c silica and possess the highest fuel content material and highest viscosity, normally exploding and manufacturing bits of rock known as tephra. Close in the area within the prime of the block https://emiliolqvad.laowaiblog.com/15891979/lava-fundamentals-explained