Description This data set of boundaries between oceanic and continental crust is based on the data set from Müller et al. (2016) with numerous modifications. We used a recent review of COB locations from Eagles et al. (2015) to re-evaluate alternative proposed COB locations, considered COB-related structures visible in the vertical gravity gradient grid (Sandwell et al., 2014) and consulted a number of recent papers proposing revised COB locations (Bond et al., 2023; Cowie et al., 2017; Funck et al., 2022; Guan et al., 2019; Mercier de Lépinay et al., 2016; Mortimer et al., 2020). The data set is made available as gpmlz file readable with open-source GPlates, pyGPlates and GPlately software (see www.gplates.org) and as ESRI shapefile. References Bond, C. E., Alcalde, J., Butler, R. W. H., McDermott, K., and Carbonell, R., 2023, Continent-Ocean Transition or Boundary? Crowd-Sourced Seismic Interpretations of the East-India Passive Margin: Tectonics, v. 42, p. e2022TC007624, https://doi.org/10.1029/2022TC007624. Cowie, L., Angelo, R. M., Kusznir, N., Manatschal, G., and Horn, B., 2017, Structure of the ocean–continent transition, location of the continent–ocean boundary and magmatic type of the northern Angolan margin from integrated quantitative analysis of deep seismic reflection and gravity anomaly data: Geological Society, London, Special Publications, v. 438, p. 159-176, https://doi.org/10.1144/SP438.6. Funck, T., Shimeld, J., and Salisbury, M. H., 2022, Magmatic and rifting-related features of the Lomonosov Ridge, and relationships to the continent–ocean transition zone in the Amundsen Basin, Arctic Ocean: Geophysical Journal International, v. 229, p. 1309-1337, https://doi.org/10.1093/gji/ggab501. Guan, H., Geoffroy, L., Gernigon, L., Chauvet, F., Grigné, C., and Werner, P., 2019, Magmatic ocean-continent transitions: Marine and Petroleum Geology, v. 104, p. 438-450, https://doi.org/10.1016/j.marpetgeo.2019.04.003. Mercier de Lépinay, M., Loncke, L., Basile, C., Roest, W. R., Patriat, M., Maillard, A., and De Clarens, P., 2016, Transform continental margins – Part 2: A worldwide review: Tectonophysics, v. 693, p. 96-115, https://doi.org/10.1016/j.tecto.2016.05.038. Mortimer, E. J., Gouiza, M., Paton, D. A., Stanca, R., Rodriguez, K., Hodgson, N., and Hussein, A. A., 2020, Architecture of a magma poor passive margin – Insights from the Somali margin: Marine Geology, v. 428, p. 106269, https://doi.org/10.1016/j.margeo.2020.106269. Müller, R. D., Seton, M., Zahirovic, S., Williams, S. E., Matthews, K. J., Wright, N. M., Shephard, G. E., Maloney, K., Barnett-Moore, N., Hosseinpour, M., Bower, D. J., and Cannon, J., 2016, Ocean basin evolution and global-scale plate reorganization events since Pangea breakup: Annual Review of Earth and Planetary Science, v. 44, p. 107-138, doi: 10.1146/annurev-earth-060115-012211. Sandwell, D. T., Müller, R. D., Smith, W. H. F., Garcia, E., and Francis, R., 2014, New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure: Science, v. 346, p. 65-67, doi:10.1126/science.1258213. The data set is a supplement to: Dutkiewicz, A. and Müller, R. D., Submarine volcanism along shallow ridges did not drive Cryogenian cap carbonate formation, Geology, https://doi.org/10.1130/G51884.1 The creation of this data set was enabled by Australia’s National Collaborative Research Infrastructure Strategy (NCRIS) via AuScope and The Office of the Chief Scientist and Engineer, NSW Department of Industry.