Repeated pulses of volcanism drove the end-Permian terrestrial crisis in northwest China by Dal Corso, J, Newton, RJ, Zerkle, AL, Chu, D, Song, H, Song, H, Tian, L, Tong, J, Di Rocco, T, Claire, MW, Mather, TA, He, T, Gallagher, T, Shu, W, Wu, Y, Bottrell, SH, Metcalfe, I, Cope, HA, Novak, M, Jamieson, RA, Wignall, PB