Slab of oceanic lithosphere are subducted under continental lithosphere at subduction zones. These zones are areas where two tectonic plates converge, and one plate (the denser oceanic plate) slides beneath the other (the less dense continental plate).

Here are some examples of where this happens:

* The Andes Mountains (South America): The Nazca Plate is subducting under the South American Plate.

* The Cascade Range (North America): The Juan de Fuca Plate is subducting under the North American Plate.

* The Japan Trench: The Pacific Plate is subducting under the Eurasian Plate.

* The Aleutian Islands: The Pacific Plate is subducting under the North American Plate.

* The Mariana Trench: The Pacific Plate is subducting under the Philippine Sea Plate.

Subduction zones are responsible for a variety of geological phenomena, including:

* Volcanoes: When the subducting plate melts, it creates magma that rises to the surface and forms volcanoes.

* Earthquakes: The movement of the plates at the subduction zone can cause earthquakes.

* Mountain Ranges: The collision of the plates can create mountain ranges.

It's important to note that not all subduction zones involve oceanic and continental lithosphere. Some subduction zones involve two oceanic plates.