Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Map of southeastern Alaska with labeled islands.
  • fig. S2. Representative boulder and bedrock samples collected for 10Be dating.
  • fig. S3. Normal kernel density estimates of 10Be ages.
  • fig. S4. Fossilized mammal bone 14C ages from caves in southeastern Alaska.
  • fig. S5. Box-and-whisker plot of fossilized cave bone δ13C values from Prince of Wales Island.
  • fig. S6. Sensitivity testing of the fossilized cave bone 14C age calibration.
  • fig. S7. Fossilized cave bone δ13C values and marine carbon percentages through time.
  • table S1. 10Be sample information.
  • table S2. 10Be ages calculated with alternative production rates and scaling schemes.
  • table S3. Fossilized cave bone sample information used for 14C calibration.
  • Reference (66)

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