(A) Plot of radius decrease ΔR and areal contractional strain ε as a function of fault plane dip θ. ΔR are determined by combining fractional areal strain for the highlands ε_LS and for maria ε_SMR. Area shaded in gray marks the likely range of θ of typical thrust faults (25°–35°). (B) Plot of estimated compressional stress as a function of the amount of radial contraction of the Moon.