...
|
|||||||||||||
 |
|||||||||||||
| A large amount of rock and soil can fall, slide, or flow when gravity pulls down a weakened area of land. The land can slide when it is wet or dry, and sometimes it is both. If the sliding rocks and land has enough water it can flow like a river. When this happens during a volcanic eruption a river of water and debris can flow for miles and is called a lahar. | |||||||||||||
|
Volcanoes grow to thousands of feet above the ground and are often pretty weak because of the melted rock that rises and erupts from the volcano. When the magma rises it shoves aside the rock from a center section of the volcano. One side of the volcano becomes steeper than other sides.Gases from inside the magma dissolves into the groundwater making the water acidic and makes the soil weaker. Rocks and other debris makes a mini-fault zone inside the soil at the top of the volcano. When gravity pulls on the weakened top cone of the volcano a landslide can occur. |
|||||||||||||
