One issue in monosequence studies is measurement techniques andthelevelofdetailintheSFFandsoilcharacterizations.Incentral Kentucky, for example, geological mapping at the same 1:24,000 spatial scale as soil maps has identified more surficial formations than there are soil series (Phillips, 2013a). This implies convergent evolution—but the soil and geological mapping were conducted at differenttimesbydifferentindividualsandorganizationsandfordifferentpurposes.Alocal-scaleanalysisinthesameregionfoundmultiple soiltypesinidenticalparent materialswith otherSFF constant, implying divergence (Phillips, 2013a).