Cobb Seamount
... that the 27-million-year-old Cobb Seamount is so heavily encrusted in sea life that no bare rock surface has been found in dives?
... that the 27-million-year-old <b id="mwDwQ"><a href="./Cobb_Seamount" id="mwDwU" rel="mw:WikiLink" title="Cobb Seamount">Cobb Seamount</a></b> is so heavily encrusted in sea life that no bare rock surface has been found in <a href="./Underwater_diving" id="mwDwY" rel="mw:WikiLink" title="Underwater diving">dives</a>?