IODP Expedition 403 Magnetic Stratigraphy Age Models for Sites U1618, U1619, and U1620 (CSF-A and CSF-B)

Magnetostratigraphic Age Models Generated for International Ocean Discovery Program Exp. 403 Sites U1618, U1619, and U1620, calcualted for both CSF-A and CSF-B Depth Scales. Prepared using Undatable MATLAB Software (iterations = 10,000, x-factor = 0.1, no bootstrapping; Lougheed & Obrochta, 2019). Assumes no major unconformaties with basal ages constrained to lowermost interpreted polarity chron. Compiled by Brendan Reilly, LDEO 8/25/2025. Age constraints as documented in Lucchi, St. John, et al., Expedition 403 Proceedings. Supports publication: St. John, K., Lucchi, R.G., Ronge, T.A., Reilly, B., Gruetzner, J., Sakai, Y., Gebhardt, A.C., Gonzalez-Lanchas, A., Johnson, J.E., Plaza-Faverola, A., Suganuma, Y., Bárcena, M.A., Schepper, S.D., Duxbury, L.C., Goss, G., Greco, N., Haygood, L., Husum, K., Iizuka, M., Monito, L.R., Rosenthal, Y., Sijinkumar, A.V., Zhong, Y., 2026. Up-current geomorphic events and local tectonics as primary controls on sediment transport by the West Spitsbergen Current and sedimentation in the Fram Strait since ca. 3 Ma. Geology. https://doi.org/10.1130/G54231.1