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| a substances resistance to flow |
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| magma that comes out of the underground earth |
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| smmothe lava that flows on land |
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| a solidified basaltic lava flow on land that has formed on rough jagged surfaces |
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| lava that cools under water taknig on a pillow-like shape when it hardens |
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Definition
| solid rock fragments that have cleavage surfaces meating at right angles |
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| a dense superheated material of gases and pyroclastic materials moiving rapidly downhill |
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| Volcanos formed on gently sloping sides which use basaltic lavas |
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Definition
| a cone shaped volcano formed by lava fragments that has been ejected by a lava vent |
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Definition
| volcanos that form when layers of materials from successive eruptive explosions accumulate a scent the materials are hardened lava flows and other pyroclastic materials |
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| a fast flowing mudfall that occurs when the heat associated with volcanic erupution melts snow on top of a volcano |
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Definition
| a large crater shape basin formed after the top of a volcano collapses |
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Definition
| a plateau made up of basaltic rocks pouring out of a crack or fissure |
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