The Oamaru Formation.

In order not to crowd the small Geological Map attached to this Report with too many tints, I have coloured this formation and the next, or Pareora formation, the same; however, I shall not fail to give a concise description of each, and moreover shall add such characteristic sections that the reader can easily follow me. The Oamaru formation, where best developed, is of considerable thickness and variety in the nature of the rocks of which it is composed. It lies either on the slopes of the Waipara formation conformably or unconformably, as the case may be, or directly upon the younger palæozoic rocks.