[PBinTX]

"How much water can the atmosphere account for?

The answer from Wikipedia: http://en.wikipedia.org/wiki/Water_vapor

"Measurements of vapor concentration are expressed as specific humidity or percent relative humidity. The annual mean global concentration of water vapor would yield about 25 mm of liquid water over the entire surface of the Earth if it were to instantly condense."

So, all the water in the atmosphere makes up about 1 inch of water. Some flood! Now, you suggest that the rest of the water came from under the earth's mantle. Under the mid-ocean ridge is molten rock, not oceans of water. Vast amounts of water could not burst forth from the mid-ocean ridges. To suggest otherwise is idiocy.

[Quix]

Sounds like

you have an assumption that

1. the degree of water vapor in the atmosphere is the same now as then.

Sounds like a silly assumption, to me.

or

2. that there was NO water canopy say as an outer shell at the upper reaches of the atmosphere.

No big surprise . . .

The Religion of Science has long construed itself as omniscient God.