The Juan De fuca plate which is under the North American plate is a small part of the Farallon plate of which the JDF is actually tearing 93 miles down below the surface. That plate is actually dying, and they don't know what happens to a tectonic plate when it comes to its end.
Big_Reply5848 t1_jb6lho4 wrote
Reply to comment by DisillusionedExLib in What happens at the end of a subduction zone? When the entire plate subducts? by kittens0423
The Juan De fuca plate which is under the North American plate is a small part of the Farallon plate of which the JDF is actually tearing 93 miles down below the surface. That plate is actually dying, and they don't know what happens to a tectonic plate when it comes to its end.