That's correct! When tectonic plates slide past each other horizontally, it's called a transform plate boundary.

Here's a breakdown:

* Tectonic Plates: These are massive pieces of the Earth's lithosphere (the rigid outer layer) that constantly move.

* Transform Boundary: At this type of boundary, plates grind past each other in opposite directions. This movement causes friction, which can lead to earthquakes.

Famous Examples:

* The San Andreas Fault in California: This is a classic example of a transform boundary. The Pacific Plate is moving northwest while the North American Plate is moving southeast.

* The Alpine Fault in New Zealand: Similar to the San Andreas, the Australian Plate moves north relative to the Pacific Plate.

Let me know if you'd like to learn more about other types of plate boundaries!