What would happen if the bottom of the lake froze instead of the top?



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    Since water expands as it freezes, the ground would swell and crack, and the water nearer the surface would flood over the existing shoreline.  If it froze quick enough from the bottom to the top, you might have ice that sticks out several inches above a lakeshore.  Since water expands by 9% when it freezes, you can expect that it would push away about 10% of the shore land around it, or stick out about 10% above the typical surface of the unfrozen water.

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