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34 terms

Plate Tectonics and Earthquake Review

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Gondwanaland
Early supercontinent made up of Africa, S. America and Antarctica
Laurasia
700my-250my when N. America collided with Eurasia
Lystrosaurus
Lived in Antarctica, India and South Africa and old school land dino / used to prove continental drift
Mesosaurus
Lived in S. America and S. Africa / freshwater reptile / used to prove continental drift
Glossopterus
Found in all Southern continents / used to prove continental drift
Caledonia
Location in Britain where the Mountain chains from long ago were connected
Coal fields in N. America
Climatological proof for the earth not being in a complete ice age
sea floor spreading
created by Harry Hess / driving force for continental drift / evidence of tectonics
paleomagnetism
evidence of tectonics / normal or reverse
earthquake and volcanic activity
tectonics evidence / plate boundaries
oceanic divergent boundary
Age of rock is younger the nearer to the boundary
Deepest trench
Formed with a fast moving oceanic-oceanic convergence
Aleutian Islands
subduction zone / volcanic arc / differing ages
Seismic moment scale
amplitude x area x rock brittleness
MOHO
70 km below surface / seismic wave speed increase / boundary between crust and mantle
Shadow zone
Only surface waves occur
Meteors
An alternative way to study the core
Elastic rebound
H.F. Reid
Rodinia
supercontinent 700 mya
Pangaea
supercontinent 300 mya
Wegener
plate tectonics / continental drift
normal fault
tensional / hanging wall falls
reverse fault
compressional / hanging wall rises
P wave
fastest / body wave / will travel through solid, liquid and gas
S wave
sheer wave / will only travel through solid
scarp
exposed rock from a fault
seismograph
instrument
seismogram
paper
seismometer
field instrument
L wave
love wave / side to side / surface wave
R wave
raleigh wave / circle wave / comes at you / surface wave
Mercalli Scale
I-XII / damage, what people feel
Richter Scale
0-9.9 / magnitude/energy / logarithmic / every one point is 32x more energy
Liquifaction
"quicksand" / ground "liquifies" / buildings sink