The montague fault formed at a boundary

The Japan Trench formed at a convergent boundary.

Explanation:

Japan trench is the oceanic trench division present in the pacific ring off fire located at the northeast of Japan. The trench subducts under the continental plate i.e. Okhotsk plate which is also a part of north America. One of the main cause behind repeated tsunamis and earthquake is the japan trench as it is associated with subduction zone were continuous movement takes place. Convergence of pacific plate and Okhotsk plate give rise to the japan trench.

it is called the mitotic spindle