The fun job for the YEC'S on this one will be to attack stalagmite formation as a dating method. It is a fairly easily understood process, with a straightforward method of calculation. The calcite is deposited at a rate which is demonstrable through easy experimentation - and best of all, if you speed up water flow, to increase the volume of calcite available (in order to account for a much shorter timescale), you end up with a rate of water flow which washes away the calcite, before it has a chance to fall out of solution and contribute to stalagmite formation.
Flooddidit.
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