EES 1000 Final

Who discovered the Continental Drift?
Alfred Wagner
Who discovered sea floor spreading?
Harry Hess
Who discovered marine magnetic anomaly?
Vine & Mathews
What is the name of the super continent?
Pangea
Name three important discoveries in support of continental drift.
fossils, age of rocks, & continental glaciers
What is marine magnetic anomaly?
magnetic polar reversal + sea floor spreading
Plate tectonic theory
lithosphere & asthenosphere
Name the boundaries
converging, transforming, diverging
Example of transforming
sand
Example of continent/continent converging
Himalayas
Example of continent/ocean converging boundaries
Andes
Ring of fire produces
volcanoes, earthquakes, and tsumanis
tsunamis are
seismic sea waves
driving mechanism of plate tectonics is located in
asthenosphere
convection cells are located un
asthenosphere and outer core
What contributes to polar magnetic reversal and where are they located?
convection cells in the outer core
balastic oceanic crust age can be determined by
distance from midatlantic ridge
heat flow at midatlantic ridge is caused by
lava/magma
_____ of rocks increase as you move away from the ridge
density
water depth at ridge is
shallow
continental shelf and continental rise are
underwater
are the continental shelf and continental rise considered part of the ocean floor? why/why not?
No; ocean floor is balsaltic, shelf and rise are not.
geomagnetic field caused by ______ in the ________ ________
dynamo effect;outer core
geomagnetic polar reversal is caused by
coupled dynamo effect
erosion surface- a break in the time sequence
unconformity
above and below are sedimentary rocks
disconformity
above are horizontal, below are angular
angular unconformity
horizontal layers of sediment above, crystalline structures below
nonconformity
Name the four fossils
Messaurus, Cynothos, Lystoarous, Glossopteris
what does the richter scale measure?
amplitude
what does the modified marchelli scale measure?
intensity
What is the first wave?
Primary Wave
What is the fastest wave?
P-wave
What is the second wave?
Secondary wave
What is the last wave?
surface wave
name the wave: rock particles vibrate & moves in a parallel direction of motion
P-wave
name the wave: cannot go through liquid
S-wave
name the wave: movement is perpendicular
S-wave
How many stations to know the distance of an earthquake?
1
How many stations to figure out location?
3 (triangulation)
bounces back
reflection
goes through
refraction
What are the three major boundaries?
crust, mantle, outer core, inner core
What is the name of the boundary between the crust and the mantles?
MOHO
Which is made of liquid? Outer Core or Inner Core
Outer Core
What has low velocity?
Asthenosphere
Which is above the asthenosphere?
lithosphere
Boundaries from less intensity to most.
Tectonic plate beoundaries, converging, subduction, Benioff zone
If a strike is given, how many dip directions and at what angle?
2 dip directions @ 90
joint fracture
no more movement
fault fracture
further movement
What waves give the most information about interior?
Seismic
axial plane is horizontal or nearly horizontal on these two folds:
overturned fold and recumbent fold
both limbs are parallel
isocline fold
negative gravity anomaly
low density or cave
positive gravity anomaly
high density
If the distance is doubled
force is decreased by 1/4
If a tectonic plate is held down against isotasy
negative
IF tectonic plate is held up at against isotasy
positive
Austerlich & Aurora Borealis are
cosmic radiation interaction with geomagnetic fold
[image]
Anticline and syncline