Thick ice, solid ice, thin ice, and open water in Mo's Slough No flash player has been set up. Please select a player to play Flash videos. Video not playing? Update your browser or download the video clip Knut Kielland talks about a combination of thick ice, solid ice, thin ice, and open water all in one area in Mo's Slough. Process Observed: Ice ThicknessThin IceSafe IceOpen Water Date Process Observed: Friday, February 12, 2010 Galleries: Mo's Slough 2 Gallery