... the study and enjoyment of Geology ... Foreshore at Lansdowne Crescent, Portrush.  Jurassic sediments indurated by underlying dolerite sill.  Old lifeboat station is on left. Updated 19/08/2019 About us Summer prog. Winter prog. Contact us Useful links Home Saturday 7th September  (Joint with BNFC). GEOLOGY AND GEOARCHAEOLOGY OF NE ANTRIM Archive Next meeting: