Post-collisional settings have long been discussed, both in the aspect of nomenclature, tectonic significance, sources of magmatism, and their relations to pre-collisional and intraplate settings. To many authors, it should be synonymous with late-orogenic or late-collisional settings because the setting itself is defined as the period following the main impact of the colliding landmasses. On the other hand, terms like post-tectonic should be avoided when referring to post-collisional associations. In such a geotectonic setting, tectonics is strongly active, especially when the stage is just established, i.e., right after the main crash. The most important difference is that flat-lying movement planes tend to become progressively less important, giving place to steeply-dipping structures. Both movement planes may be active de-pending on the collision angle, as is the case of transpressional orogens resulting from docking. In such situations, orthogneisses produced by collisional metamorphism over arc plutonic and/or volcanic associations will likely be intruded by syntectonic post-collisional magmas that register deformation in the presence of variable amounts of magmatic liquid or due to high-temperature conditions lasting through the subsolidus state.