Denudation in the Mesozoic is counted at most in hundreds of meters.[13] The inselberg plain of Finnish Lapland is estimated to have formed in Late Cretaceous or Paleogene times, either by pediplanation or etchplanation. Any older Mesozoic surface in Finnish Lapland is unlikely to have survived erosion.[14] Further west, the Muddus plains and its inselbergs formed —also by etching and pediplanation— in connection to the uplift of the northern Scandinavian Mountains in the Paleogene.[15]