Discovery of a major negative 13C spike in the Carnian (Late Triassic) linked to the eruption of Wrangellia flood basalts Dal Corso, J. ; Mietto, P. ; Newton, R. J. ; Pancost, R. D. ; Preto, N. ; Roghi, G. ; Wignall, P. B. Abstract Publication: Geology Pub Date: January 2012 DOI: 10.1130/G32473.1 Bibcode: 2012Geo....40...79D