Chapter 9
Order by
15 terms
Terms | Definitions |
|---|---|
 aa | solidified basaltic lava flow on land that has formed with rough jagged surfaces |
| Caldera | a large crater shaped basin that formed after the top of a volcano collapsed |
| Cinder Cone Volcano | a cone shaped volcano that formed from lava fragments that have been ejected from a volcanic vent |
| Composite Volcano | a volcano made up of layers of hardened lava flow and pyroclastic materials |
| Hot Spot | an area of volcanic activity that results from a plume of hot solid material that has risen from deep within earths mantle |
| Lahar | a fast moving mud flow that occurs when the heat associated with a volcanic eruption melts snow and ice on top of a volcano |
| Lava | magma that has reached earths surface |
| Lava plateau | a plateau formed from basaltic lava pouring from a crack or fissure in earths surface |
| Phahoehoe | solidified basaltic lava that has formed with sooth rope like surfaces |
| pillow lava | lava that solidifies underwater and takes on a pillow like shape as it forms |
| Pyrocrastic Flow | a dense superheated cloud of gases and pyrocrastic materials that move rapidly down hill during a volcanic eruption |
| Pyrocrastic materials | solid rock fragments that are ejected during a volcanic eruption |
| Shield Volcano | a shield shaped volcano with gently sloping sides and a broad base that is made out of basaltic lava |
| Viscosity | a substances resistance to flow |
| Volcano | an opening in earths crust through that molten rock,gases and ash erupt, also land form that develops around this opening |
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