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27 Cards in this Set
- Front
- Back
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2 continents that have best fit
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South America and Africa
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Fastest traveling seismic waves
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P wave (primary wave)
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Transform faults/strike slip move...
and are found in.... |
in opposite direction
California |
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Divergent Boundaries
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Go apart
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Convergent Boundaries
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Come together
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Pangea
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means all the land when all the continents were joined about 200,Alfred Wegener used the team first
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Stations needed for earthquake location
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At least 3 are needed
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rock evidence to prove Pangea
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Appalachian mountains matched exactly with mountains in the British and Scandinavia
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Sea floor spreading and the age of the rock
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Plates diverge in the Atlantic Ocean
Rock is younger at the Mid ocean ridge and older at the edges |
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Chain of volcanos parallel to subduction zone
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Island Arc
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Continental Crust vs. Ocean Crust
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Continental is less dense, lighter in color made of granite
Ocean is more dense, darker in color and basalt |
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Epicenter
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the point on the earth surface
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Focus
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Below the surface and underground
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Seismograph
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instrument that measures the earthquakes
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richter scale
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grading scale also use the Mercalli scale
it measures the magnitude of earthquakes |
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lithosphere
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is the upper mantle and the crust
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asthenosphere
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is below the lithosphere made up of moltch
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ALfred Wegener
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father of the continental drift theory
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Layers on the earth quakes and thickness of each
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crust-thinnest
mantle-thickest liquid outer core and then the solid inner core |
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Virginia's earthquakes
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we're not on a plate boundary can still have them
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Himalayas formation
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formed when India converged to Asia
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Folded mountains occur when two plates
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converged
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Seismic waves
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P,S,L,R
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Hawaii formation and the islands age
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hot spot Kauai is the oldest
Hawaii youngest |
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distance from seismograph to focus is 5500 km what is the difference in P and S arrival time 4500
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7 mins in 5500 and 6 mins in 4500
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Magnitude
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energy of the quake
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intensity
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damage of the quake
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