A supplementary data archive containing plate reconstruction files for use in GPlates. This plate model was modified from a recently-published model (1) as follows. Subduction zones to which no motions were assigned were initially stationary through time; these were assigned new motions relative to the global plate circuit to model moderate trench retreat while still remaining consistent with tomographic constraints. The Orcas plate was split into two separate plates at 170–130 Ma, consistent with its configuration after 130 Ma, in order to accommodate divergence at the plate boundaries. The Caribbean plate was also split by a new back-arc spreading centre at 140–120 Ma, to allow for the formation of the Caribbean large igneous province at a spreading ridge (2). Finally, the absolute plate motion model was constrained using an iterative optimisation workflow (3) References EJ Clennett, et al., A Quantitative Tomotectonic Plate Reconstruction of Western North America and the Eastern Pacific Basin. Geochem. Geophys. Geosystems 21, 1–25 (2020). A García-Reyes, J Dyment, Structure, age, and origin of the Caribbean Plate unraveled. Earth Planet. Sci. Lett. 571, 117100 (2021). MG Tetley, SE Williams, M Gurnis, N Flament, RD Müller, Constraining Absolute Plate Motions Since the Triassic. J. Geophys. Res. Solid Earth 124, 7231–7258 (2019).