The Ring of Fire is a region around the Pacific Ocean characterized by a high concentration of active volcanoes and earthquakes. This is caused by the subduction of several oceanic tectonic plates beneath the surrounding continents and other oceanic plates.

Here are the major plates being subducted beneath the Ring of Fire:

* Pacific Plate: The largest oceanic plate, it's being subducted under the North American plate (western North America), the South American plate (western South America), the Philippine Sea Plate (Philippines), and the Eurasian Plate (Japan and the Kuril Islands).

* Nazca Plate: This oceanic plate is being subducted under the South American Plate (the Andes Mountains).

* Cocos Plate: Being subducted under the Caribbean Plate (Central America).

* Juan de Fuca Plate: Being subducted under the North American Plate (the Cascadia Subduction Zone, along the Pacific Northwest coast of North America).

* Philippine Sea Plate: Being subducted under the Eurasian Plate (Japan and the Ryukyu Islands) and the Mariana Plate (Mariana Islands).

It's important to remember:

* The Ring of Fire is not a single, continuous plate, but rather a collection of plates interacting along complex boundaries.

* The subduction of these plates causes the melting of the mantle, leading to volcanic activity and also generating the pressure that causes earthquakes.

Therefore, the Ring of Fire is not formed by a single subducted plate, but a complex system of interactions between several different plates.