* Sliding boundaries (transform boundaries) are where two tectonic plates slide past each other horizontally.

* The primary activity at these boundaries is friction and earthquakes. The plates are grinding against each other, causing the buildup of stress that is eventually released in the form of earthquakes.

* No new crust is created, and no existing crust is destroyed in this process. The plates simply shift horizontally along the fault line.

Examples of sliding boundaries:

* The San Andreas Fault in California

* The North Anatolian Fault in Turkey

Let me know if you'd like more information about plate tectonics or any other type of boundary!