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20 Cards in this Set
- Front
- Back
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Three types of waves:
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Primary, secondary, surface
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Primary Waves
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-Fastest
-Push-pull motion -Compressional -Solids and liquids |
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Secondary Waves
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-Arrive after p waves
-Transverse -Solids |
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Surface Waves
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-Most damage
-Slowest -Rolling |
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Where to earthquakes occur?
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Plate boundaries
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Active Volcanoes
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Regularly erupting
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Dormant Volcanoes
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Inactive, "resting"
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Extinct Volcanoes
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"Dead", no source of magma
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Where are volcanoes located?
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Hotspots, plate boundaires
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What is tephra?
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Volcanic debris (rock)
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Examples of tephra:
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ash, cinders, bombs
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Four types of mountains:
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Folded, upwarped, fault-blocked, volcanic
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Folded Mountains
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Sedimentary rocks folds when land collides; Himalayas
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Upwarmed (Domes) Mountains
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Crust pushed up by magma. Sedimentary layer erdoed away, exposing igenous. Black hills.
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Fault-blcoked Mountains
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Movement of large blocked of crust. Sierra Nevadas, Mid-Ocen Ridge.
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Types of volcanoes:
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Shield, cindercone, composite
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Shield
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Gentle slope, broad. Hawaii.
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Cindercone
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Steep, more active, pile of ash and cinders.
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Composite
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Layers of lava and solid rock and ash.
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Rules of a topographic map:
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-Contour lines never cross
-Contour lines form a V that points upstream when they cross a stream |
