Warm Up Why was the Mt. St. Helens Eruption so destructive? What about the explosion was not predicted by most scientists?
Despite the high temperature in the mantle, most of the layer remains solid due to extreme pressure – Magma: liquid rock produced under Earth’s surface.
Volcanic Eruptions Ms. Pilcher. Vocabulary Mafic lava- dark in color and is rich in magnesium and iron. Felsic lava- lighter in color when cools, high.
