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Types of Plate Motion

The ways that plates interact depend on their relative motion and
whether oceanic or continental crust is at the edge of the
lithospheric plate. Plates move away from, toward, or slide past each
other. Geologists call these divergent, convergent, and transform
plate boundaries.

At a divergent plate boundary lithospheric plates move away from each
other. The mid-Atlantic Ridge, a topographically high area near the
middle of the Atlantic Ocean, is an example of a divergent plate
boundary.

At a convergent plate boundary, lithospheric plates move toward each
other. The west margin of the South American continent, where the
oceanic Nazca Plate is pushed toward and beneath the continental
portion of the South American Plate, is an example of a convergent
plate boundary.

At a transform plate boundary, plates slide past each other. The San
Andreas fault in California is an example of a transform plate
boundary, where the Pacific Plate slides past the North American
Plate.
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References

1. file://localhost/vwdocs/vwlessons/plate_tectonics/part12.html
2. file://localhost/vwdocs/vwlessons/atg.html
3. file://localhost/vw.html