The Silian subcontinent is a geographic extension of Niera protruding south from the Basson Mountains into the Selianis Ocean. The tectonic plate under its right edge broke off and cracked in several places, eroding away and forming the Etrusian Sea.


While the southern area is most flat plains, tectonic activity on the northern edge has created large mountain ranges, creating rolling hills in the northern and eastern areas. Rain from the mountains feeds the Ironwood Forest and the Vician River, the largest in the area.