Pressure from a pool of magma has just cracked solid rock, creating a volcano-tectonic (VT ... fault and the Mid-Atlantic Ridge). VT events cycle as many as five times a second, particularly ...

which are heated and compressed underground.Igneous rocks are formed when molten rock from volcanic activity cools down either underground or on the surface.This slow but continuous cycle of rock ...

Tephra is a general term for fragments of volcanic rock and lava that are blasted into the air by explosions or carried upward by hot gases. Tephra includes large, dense chunks, light rock debris ...

Iceland is bracing for a volcanic eruption ... “Now it’s pretty clear we are in this very active cycle again. We could be going into these kind of eruptions for the rest of our lifetimes ...