Mmm the ocean is almost 6 miles deep at the Mariana Trench and as far as I know the weight of water here has little effect on the earth's crust.If you have no idea what the Earth looked before Noah's global flood how do you know that the landscape we observe now is not the result of it ?
The weight of a 5 miles high flood surely should have an effect on the Earth crust.
Perhaps you might need to rethink this a little.
Dizredux
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