Lesson 3 - Volcanic Landforms
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20 terms
Terms | Definitions |
|---|---|
 Caldera | the large hole at the top of a volcano formed when the roof of a volcano's magma chamber collapses |
| Cinder Cone | a steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening |
| Composite Volcano | A tall, cone-shaped mountian in which layers of lava alternate with layers of ash and other volcanic materials |
| Shield Volcano | A wide, gentle sloping mountain made of layers o lava and formed by quiet eruptions |
| Volcanic Neck | a deposit of hardened magma in a volcano's pipe |
| Dike | a slab of volcanic rock formed when magma forces itself across rock layers |
| Sill | a slab of volcanic rock formed when magma squeezes between layers of rock |
| Batholith | a mass of rock formed when a large body of magma cools inside the crust |
| What landforms are formed by magma? | batholiths, dikes, sills, and dome mountains |
| Repeated floods of molten materal can form high, level plateaus called ____ plateaus. | lava |
| A ___ forms when magma cuts across rock layers and then hardens. | dike |
| A volcanic neck forms when magma hardens in a volcano's ___ and the surrounding rock laters wears away. | pipe |
| Volcanic necks and dikes form when magma cools and hardens into rock ___ reaching the surface. | before |
| When a volcano collapses, a hole called a ___ is left behind. | caldera |
| A ___ volcane is tall, cone-shaped, and made up of alternating layers of lava and ash. | composite |
| A wide, gently sloping mountain formed by thin layers of lava that pour out of a vent and harden on top of previous layers is known as a ____ volcano. | shield |
| ____ forms from magma that squeezes between horizontal rock layers and later hardens. | sill |
| A mass of rock that forms when a large body of magma cools inside the crust is called a(n) ____. | batholith |
| Sometimes rising magma is blocked by horizontal layers of rock. The magma forces the layers of rock to bend upward into a landform called a(n) ___. | dome mountains |
| Ash, cinders, and bombs build up in a steep pile to form _____ volcanoes. | cinder cone |
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