chapter  2
Structure and land forms
Pages 29

Though some doubts and uncertainties remain as to regional detail (and the commercial importance of oil-bearing strata has tended to retard complete public statements), knowledge of the geology and pattern of structural units is now much clearer. The situation of several decades ago, when one could note a near absence of published information for certain areas has now totally changed, as a result of the intensive surveys carried out for petroleum and other mineral exploitation.