Geologically, the Franconian Heights belong to the Keuper Uplands, which run through both the Franconian Keuper-Lias Land and through the adjacent Swabian Keuper-Lias Land to the southwest, and is also surrounded by lias country. Its northern continuation is the Steigerwald, up to 499 m high, which transitions into the Haßberge (up to 512 m) on the far side of the River Main. Its southern continuation, the Swabian-Franconian Forest, runs from the southern boundary of the Heights, mainly westwards, and is a little higher, climbing to 586 m.