FIELD GEOLOGY OF THE SHOALHAVEN DISTRICT (PART 13) Chapter 7: The Beecroft Peninsula The heads of Jervis Bay are unique features. Both of them project seawards contrary to the south westerly trend of the coast and both are flanked by great sea cliffs unequalled in NSW. The northern headland is much more accessible than the southern. The southern headland lies in Commonwealth Territory and will be considered in chapter 8. The geological map indicates that the Conjola Formation is the dominant underlying rock, but there is far more to the understanding of its origin than this fact alone. It would appear that a combination of folding and a major offshore fault may have elevated this area in comparatively recent times. If we remember that the sea has been at its present level for only the last 10,000 years, then we cannot explain the cliffs or the great opening of Jervis Bay by marine erosion only. Suggested explanations for these features include the idea that the ...