World Ocean Chap 2
which of the following is a characteristic of oceanic continental convergent plate boundaries
andesitic volcanoes
which of the following is true about the asthenosphere
asthenosphere is composed of outer mantle material
the san andreas fault
continental transform fault
all continents fit together with the least number of overlaps and gaps when the continents are matched along
contours at around 2000 meters in depth
confirmation of seafloor spreading was supported by the
age of the seafloor
mid atlantic ridge is an example of
divergent boundary
convergent plate boundaries occur when tectonic plates move in opposite directions
false
oldest rocks are located at mid ocean ridges
false
paleomagnetism confirms that at particular times in the geologic past Earth has had more than one magnetic north pole
false
water depth decreases as you move away from the mid ocean ridge
false
what does not fit the pattern: aleutian islands, andes mountains, hawaiian islands, japan, mariana trench
hawaiian islands
moving from oceanic ridge to oceanic trench the age of lithosphere
increases in proportion to the distance
differences in height between continental crust and oceanic crust are explained by
isostasy
vine and matthews determined that new ocean floor was being produced at ocean ridges by examining
magnetic pattern on the seafloor
what does not fit the pattern: hydrothermal vents, rift valley, oceanic ridge, oceanic trench, spreading center
oceanic trench
seafloor magnetic pattern is best described as
parallel to and symmetric about ocean ridges
all of the following provide evidence for continental drift except
seafloor magnetic pattern
deep focus earthquakres are often associated with deep sea trenches
true
fast moving spreading ridges tend to be more gently sloped than slow moving rides
true
relatively young age of the seafloor supports the idea that subduction must take place
true