Landing, E., Schmitz, M.D., Westrop, S.R., Geyer, G., 2025. U-Pb volcanic zircon dates from New Brunswick constrain the Middle Cambrian Drumian Stage and trans-Avalonian green–black boundary. Geological Magazine 162, e25. doi:10.1017/S0016756825100137

Farrell, T.P., Cothren, H.R., Sundberg, F.A., Schmitz, M.D., Dehler, C.M., Landing, E., Karlstrom, K.E., Crossey, L.J., Hagadorn, J.W., 2025. Revising the late Cambrian time scale and the duration of the SPICE event using a novel Bayesian age modeling approach. Geological Society of America Bulletin doi:10.1130/B37919.1