Shaye Jenrich Unit 2
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卡片预览 (15 张)
Normal polarity
north and south poles are aligned as they are now.
Bathymetric maps
reveal the features of the ocean floor as if the water were taken away
Reversed polarity
north and south poles are in the opposite position.
The lithosphere
is divided into a dozen major and several minor plates Plates move at a rate of a few centimeters a year, about the same rate fingernails grow.
Convergent plate boundaries
the two plates move towards each other
Divergent plate boundaries
the two plates move away from each other
Transform plate boundaries
the two plates slip past each other.
Elastic deformation
the rock returns to its original shape when the stress is removed.
Plastic deformation
the rock does not return to its original shape when the stress is removed.
Fracture
the rock breaks.
Compression
Squeezes rocks together
Tension
Pulls rock apart
Shear
Forces are parallel, moving in opposite directions
Joint
A type of fracture with no movement on either side
Fault
A type of fracture with movement on one side or both sides