Tectonic Plates

[Aussie_Girl]

what happens at the boundaries between plates when they slide past each other,push against each other and move away from each other Thanks

[bernardo]

Either: one slips under the other and goes down into the earth's crust where it eventually melts and gets recycled
Or: they move apart and let lava erupt through the gap - which eventually solidifies and creates new land.

[pinus]

The first reference from a Google search on tectonic plate is http://www.seismo.unr.edu/ftp/pub/louie/class/100/plate-tect onics.html which probably tells us more than we'd ever want to know