Specifically, the type of landslide you're referring to is a translational slide. This occurs when a cohesive block of material (like rock or soil) moves downslope along a relatively flat, inclined surface.

Here's why it's not just any landslide:

* Translational: The movement is primarily horizontal, with little to no rotation.

* Slide: The block moves along a defined surface, rather than flowing like a fluid.

Other types of landslides include:

* Rotational slides: The block rotates as it moves downslope, often along a curved surface.

* Flows: The material moves as a fluid, like a mudflow or debris flow.

* Falls: Material detaches from a cliff or slope and falls vertically.

Let me know if you'd like to learn more about any of these types of mass movements!