Multiple negative carbon-isotope excursions during the Carnian Pluvial Episode (Late Triassic) by Corso, J, Gianolla, P, Rigo, M, Franceschi, M, Roghi, G, Mietto, P, Manfrin, S, Raucsik, B, Budai, T, Jenkyns, H, Reymond, C, Caggiati, M, Gattolin, G, Breda, A, Merico, A, Preto, N