Tidal evolution over 680Myr: is there a geological supertidal cycle?

Mattias Green1, Joseph Molloy2, Harry Davies3, Hannah Meenagh Byrne2 and Joao Duarte4, (1)Bangor University, Bangor, LL59, United Kingdom, (2)Bangor University, Menai Bridge, United Kingdom, (3)Instituto Dom Luis, Lisbon, Portugal, (4)Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal