 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).These rocks have been encountered also by wells Gargano-1 (G.1 - Conoco) and Foresta Umbra-1 (F.U.