Apulia Platform, whereas the eastern part is characterized by slope and basinal deposits.

The backbone of the Gargano Promontory consists of a thick pile (3000-3500 m) of Jurassic and Cretaceous shallow-water carbonates. A small outcrop of Upper Triassic evaporite (Anidriti di Burano) and black limestone is present on the northern seashore (Punta delle Pietre Nere).