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17 Cards in this Set
- Front
- Back
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rock fragments thrown in air during eruption |
tephra |
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smallest tephra |
dust |
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less than 0.25 mm in diameter |
dust |
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less than 2 mm in diameter |
ash |
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means 'little stones' |
lapilli |
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2-64 mm in diameter |
lapilli |
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angular shaped fragments |
blocks |
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size of car or small building |
blocks |
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rounded or streamlined blobs |
bombs |
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cooled and shaped as they go through the air |
bombs |
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rapid moving gas, ash, and tephra |
pyroclastic flow |
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moves at 200 km/h |
pyroclastic flow |
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over 700° C at center |
pyroclastic flow |
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lava cools around a tree |
tree mold |
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lava flows under ground in these |
lava tubes |
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Ropey smooth lava flow |
pahoehoe lava |
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crumbly, rocky lava flow |
A'a |
