***Contents of the included files*** **Text S1:** Details of the morphological metrics examined in this study **Text S2:** Method detail for our Kernel Density Estimation analysis **Text S3:** Method details for our Metropolis-Hastings style Markov chain Monte Carlo analysis **Text S4:** Descriptions of Supplementary Tables and Datasets **Table S1:** Modes, medians, means, and standard deviations of the derived metrics for each investigated population **Tables S2 – S7:** Derived metrics, morphological affinities, topographic, and geographic data for the investigated terrestrial and cerean features **Datasets S1 – S6:** Major and minor axes topographic profiles for the investigated terrestrial and cerean hills **Figure S1:** Map of the Cima volcanic field with verification results for the Monte Carlo analysis **Figure S2:** Map of Alaskan pingos with verification results for the Monte Carlo analysis **Figure S3:** KDE probability density functions for the Occator hill subpopulations