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Methane-derived carbonate rocks (Lucina limestone and Marmorito limestone) crop out in Monferrato (NW Italy) and represent one of the first described examples of rocks produced at fossil cold seeps. These rocks, of Miocene age, consist of strongly carbonate-cemented siliciclastic sediments ranging in grain size from mud to coarse sand. The methane-related origin of Monferrato carbonates is based on:...
A multidisciplinary study, including stratigraphic, sedimentological, biostratigraphic, petrographic, magnetic fabric and SEM analyses, has been performed on six volcaniclastic layers (VLs) interbedded in the Burdigalian shelf succession of the Monferrato (NW Italy). The aim was to distinguish between the volcanic and sedimentary processes that produced these deposits, to suggest a depositional model...
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