Previous Global Superstorm ??

In my opinion, we have had a previous Global Superstorm. One of the proof is that the monument in Yonaguni Island that located 75 miles Southwest of Okinawa sank to the bottom of the sea. The only reason why the monument sank to the bottom of the sea is that the previous Global Superstorm cause increasing temperature in the universe that cause ices in both poles were melting. Of course as the ice melt, the lowlands along the coast are going to sank to the sea. I believe that this monument was built along the coast at that time, so by the ices were melting, this monument also sank to the bottom of the sea.