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Card 26
Front
What are fracture zones at mid-ocean ridges?
Back
Card 27
Front
How did geologists produce a magnetic reversal chronology?
Back
Card 28
Front
Why are some polarity anomalies classed as positive and others negative?
Back
Card 29
Front
If rocks of 4.5 million years old lie 45 km away from the ridge axis in the North Atlantic, what is the spreading rate?
Back
Card 30
Front
Define:lithosphere. Is it more malleable or hard?
Back
Card 31
Front
How rigid is the aesthenosphere?
Back
Card 32
Front
If both the lithosphere and aesthenosphere are made of ulltramafic rock what defines the boundary between the two?
Back
Card 33
Front
Compare the thickness of continental and oceanic plates.
Back
Card 34
Front
How does the rock type affect the density of oceanic and continental plates?
Back
Card 35
Front
Is the lithosphere continous?
Back
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