Across
- 4. rock fragments and particles ejected by a volcanic eruption
- 5. a type of rock that solidified from lava or magma
- 6. a destructive mudflow on the slopes of a volcano
- 7. the sliding down of a mass of earth or rock from a mountain or cliff
- 9. a sudden and violent shaking of the ground, sometimes causing great destruction
- 10. the layer of unconsolidated rocky material covering bedrock
Down
- 1. a volcano built up of alternate layers of lava and ash
- 2. a cavity in the ground caused by water erosion and providing a route for surface water to disappear underground
- 3. the point on the earth's surface vertically above the focus of an earthquake
- 8. a tectonic boundary where two plates are moving away from each other and new crust is form