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The rocks are on the ground, not the ice. They are surrounded by floating ice sheets. But the ice sheets are gigantic and I assume the massive surface area co
by IvyMike 12y ago
The rocks are on the ground, not the ice. They are surrounded by floating ice sheets. But the ice sheets are gigantic and I assume the massive surface area combined with the right amount of wind friction generates enough force to push the rocks. (Of course now I'm wondering why the ice sheets don't buckle, especially in the spots where they abut the rock.)
- scott_s 12y agoGood question. Perhaps the pressure at any given point of contact is too low to cause the ice to buckle, but there's enough surface area of the rock in contact with the ice for the aggregate force to be large.
- ars 12y ago> ice sheets don't buckle Ice is quite strong, especially in compression. To buckle the ice (i.e. flexure strength) you would need enough force to lift the ice both against gravity and against the air pressure holding it to the water below.
- dasil003 12y agoMaybe the sheets do break, but that doesn't stop them: https://www.youtube.com/watch?v=fqptbtwXUCs https://www.youtube.com/watch?v=fqptbtwXUCs