Term
|
Definition
| a weak spot in the crust where magma has come to the surface |
|
|
Term
|
Definition
| the molten mixture of rock-forming substances, gases, and water from the mantle |
|
|
Term
|
Definition
| liquid magma that reaches the surface |
|
|
Term
|
Definition
| a major belt of volcanoes that rims the Pacific Ocean |
|
|
Term
|
Definition
| a string of islands formed by the volcanoes along a deep ocean trench |
|
|
Term
|
Definition
| an area where magma from deep within the mantle melts through the crust above it |
|
|
Term
|
Definition
| a wide, gently sloping mountain made of layers of lava and formed by quiet eruptions |
|
|
Term
|
Definition
| a steep, cone-shaped hill or mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening |
|
|
Term
|
Definition
| a tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials |
|
|
Term
|
Definition
| the large hole at the top of a volcano formed when the roof of a volcano's magma chamber collapses |
|
|
Term
|
Definition
| a deposit of hardened magma in a volcano's pipe |
|
|
Term
|
Definition
| a slab of volcanic rock formed when magma forces itself across rock layers |
|
|
Term
|
Definition
| a slab of volcanic rock formed when magma squeezes between layers of rock |
|
|
Term
|
Definition
| a mass of rock formed when a large body of magma cooled inside the crust |
|
|
