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1. Crustal Thickness

   Linked via "Airy model"

   Theoretical Constraints and Isostasy
   The equilibrium state of the crust is often described by models of isostasy, which posit that topographic features are supported by variations in crustal roots compensating for density differences with the mantle. The simplified Airy model relates topographic height ($h$) to the required root thickness ($r$) via:
   $$ h \rho_c = r \Delta \rho $$
   Where $\rhoc$ is the crustal density and $\Delta \rho = \rhom - \rhoc$ is the density contrast between the mantle ($\rhom$) and crus…