Not an area I know that well but I have been along most of that stretch and not seen anything that would fit the description, still plenty to look at and explore along the coast there, like the old guns below the large German look out bunker.
There is a dig finishing shortly with students around the area above the Pinnacle, and there is a talk on Thursday 15th at 7:30 at the Societe Jersiaise by Dr. Matt Pope, Senior Research Fellow University College London, and Dr Chantal Conneller of Manchester University and other members of the project team who are at present in Jersey for extensive mapping, recording and documenting Palaeolithic and Mesolithic sites in Jersey. The talk will be about their local research and initial findings and ongoing national and international research into the human occupation during and after the Ice age, I hope to be there.