Mount St. Helens was an intermediate eruption. Much more explosive—but unusual—are felsic lavas, which are 70 % silica and possess the very best gasoline information and optimum viscosity, generally exploding and developing bits of rock termed tephra. Pāhoehoe lava appears easy and ropy. It moves slower and stays hotter than https://lava18631.onzeblog.com/14365552/details-fiction-and-lava