Science Advances

Supplementary Materials

This PDF file includes:

  • section S1. Uncertainties of and modifications to the ages of the seafloor
  • section S2. Probability distribution functions for all and K-Pg–aged crust
  • section S3. Examples of anomalous seafloor created at K-Pg time with volume and area estimates
  • section S4. Modeling of gravity anomalies
  • section S5. Probability distribution functions for crust created at slow- and intermediate-spreading rates
  • fig. S1. Mean error of the seafloor from the study of Müller et al. (18).
  • fig. S2. Comparison between the PDFs for gravity anomalies for all and K-Pg–aged crust.
  • fig. S3. Example gravity and topographic anomalies on K-Pg–aged crust.
  • fig. S4. Profiles of flexurally adjusted surface (top) and Moho (middle) topography, along with free-air gravity anomaly (bottom), for a rectangular load at both top and bottom of an initially 6-km-thick plate.
  • fig. S5. Required and available volumes of basalt.
  • fig. S6. Compare Fig. 1 (A and B) of the main text.
  • References (50–54)

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