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20 Cards in this Set

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