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Study Sheet: Test 2 - Geol V11 (Oceanography) - Chap 3 & 4
Prior to Wegener's theory of continental drift others such as Leonardo da Vinci and Sir Francis
Bacon were curious about what evidence that seemed to support moving plates: (46)
The theory of seafloor spreading was proposed by: (48)
The Glomar Challenger: (35/video)
The place where old seafloor is destroyed and subducted is: (83)
The magnetic striping of the seafloor is considered evidence of seafloor spreading because:
(58)
Cores drilled into the seafloor have shown the: (video)
The oldest rocks of the continents are over 3 billion years old. The oldest rocks from the
seafloor are only about _____ years old. (48)
According to plate tectonic theory, the number of major crustal plates is about: (49)
The place where seafloor spreading originates and where new crust is produced is: (50+)
The basic driving force for plate tectonics seems to be ____________. (48)
The upper lithosphere is also called the: (43)
As continental masses erode down, isostatic adjustment causes them to: (45F)
Which of these statements about activities along subduction zones is true? (54F)
On a global map, it can be seen that plate boundaries coincide with: (46)
Plate tectonics is associated with movements in the mantle. Recent maps shows that: (77F &
video)
Seafloor spreading and the production of new crust occurs at: (51)
The numerous transform boundaries or fracture zones that run perpendicular to mid-ocean
ridges exist because: (77)
The zone of earthquakes found along the region where one plate subducts under another is
called: (49)
If you examined two core samples drilled from the seafloor ten miles east of and ten miles
west of the Mid-Atlantic Ridge, you’d probably find: (58+)
Iceland is associated with (what type of plate boundary or activity): (79/80F)
Japan is associated with (what type of plate boundary or activity): (54F)
Ethiopia, Kenya, and other parts of east Africa are associated with (what type of plate
boundary or activity): (51)
The Himalayan Mountains are associated with (what type of plate boundary or activity): (55)
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The Andes Mountains are associated with (what type of plate boundary): (51)
Where an oceanic plate collides with a continental plate: (51)
Where would you expect to find terranes? (57/58F)
The magnetic “stripes” observed on the seafloor result from: (60F)
Most of the heat that drives convection in the mantle: (44/50)
The youngest and oldest volcanos of the Hawaiian-Emperor chain are: (57F)
The Atlantic Ocean: (50+)
Plate movement along a transform boundary causes [caused]: (55)
The rate at which crustal plates move is about: (49)
The Pacific (west) side of the San Andreas Fault is moving: (55F)
Many geologists consider _______ to be a major force driving plate movement. (49)
Which of these does not characterize active-margin continental shelves? (72)
What marks the true edge of a continent? (73)
What kind of gas can form solid compounds (ice) of potential commercial value at the right
subsea temperatures and pressures? (video)
The depth of the shelf break is surprisingly constant worldwide, but is much deeper on
Antarctica and Greenland due to: (73)
Submarine canyons probably begin to form: (74+)
Most of the sediments that form the continental rise are carried by: (76)
Submarine canyons are an integral part of the slope topography, mainly because they: (77)
When and where were hydrothermal vents discovered? (77)
Seamounts are best described as: (83)
Island arcs are curving chains of islands and seamounts associated with: (45)
Convection is the term which describes: (50)
Black Smoker chimneys at hydrothermal vents are mainly composed of: (79)
What technology was used to see through the sediment layers and identify the true topography of the abyssal plain? (81)
Where is the deepest known place on the ocean floor? (83)
Scientists propose that our existing continental shelves were sub-aerial (above the water)
during the last ice age when sea level was lower. When was the height of the last ice age?
(72)
Bathymetry is: (66)