The tidal sand ridges in the East China Sea and the sand ridges in the Celtic Sea are all large-scale and deep water sand ridegs on open continental shelf, and were formed in the postglacial sea level rise period.

• 东海潮流沙脊与凯尔特海沙脊均为开阔陆架上的大型深水沙脊,它们都形成在冰后期海面上升时期。