Ancient methane seep deposits exposed in the Apennine mountains of northern Italy are key to reconstruct the geodynamic evolution of the Miocene foredeep basin prior to the Messinian Salinity Crisis. Here, we report on a new Miocene outcrop of seep-carbonates in the Romagna region which showed indications of paleo-gas hydrate destabilization. We combined carbonate facies analyses, petrography of thin sections, scanning-electro...