Remember that there IS water found in space, and when water becomes subjected to colder temperatures as in the atmosphere, it becomes magnetic.
There is a little particle of truth to this. When you cool water below about 5 degrees C and pressurize it to above about 300,000 pounds per square inch pressure, you can form a solid known as ice-VIII ("ice-eight") which is weakly antiferromagnetic. Whether that means that the Earth's magnetic field will hold it up, I don't know; I do know that pressures of 300,000 psi are going to be very hard to come by in Earth orbit. Ordinary liquid water can be levitated by magnetic fields a few hundred thousand times as strong as the Earth's magnetic field, but it seems to me that a scenario with such a strong field might make it tricky for antedeluvian people, animals, and especially lakes and oceans, to stay in the places they want to be.
See
http://www.sbu.ac.uk/water/index.html for a deeper treatment.
As to calibration of the 14C clock - go to
Science | AAASand register - it's free. Use their search function to find the paper by Kitigawa and van der Plicht in volume 279, pages 1187-1190, from 1998. Read it, for free, and find out about the 45,000 layers they counted in Japanese lake bottom sediments, and the 250 14C dates they got on leaves and insect parts out of those layets. Read about how these correlate with tree rings from Germany, ice cores from Greenland and Antarctica, uranium dates of coral in Indonesia and the Bahamas......
Then get back to me on the "inaccuracy" of carbon-14 dating.