Final answer:
Large-scale releasing bends can form volcanoes where the crust may be sufficiently thinned that volcanism occurs. This phenomenon is often associated with plate tectonics and the types of boundaries that have magma associated with them.
Step-by-step explanation:
Large-scale releasing bends can form volcanoes where the crust may be sufficiently thinned that volcanism occurs. This phenomenon is often associated with plate tectonics and the types of boundaries that have magma associated with them.
Tectonic plates that are diverging (or pulling apart) can cause the underlying region of the mantle to experience reduced pressure conditions, leading to magma production. Where tectonic plates are converging (coming together), one plate may subduct below the other plate, resulting in the release of water and the formation of volcanoes.