New ocean crust is formed at a

Divergent boundaries - At the mid-oceanic ridges, two tectonic plates diverge from one another. New oceanic crust is being formed by hot molten rock slowly cooling and solidifying. The crust is very thin at mid-oceanic ridges due to the pull of the tectonic plates

New oceanic crust can formed when two plate boundaries converge. When boundaries converge they create larger structure of newly developed land. When two plates diverge