Carbon Dating DOESN'T work beyond 4500 years

I am wondering, has the Earth always rotated at the same speed? Could it be possible that if the Earth was formed by a massive explosion, the energy from that would cause a faster rotation and in turn create a sufficient amount of force to hold the water. Then as it began to slow the water would fall to the Earth. Now if the rate of decrease was enough could the water have fallen in a one month period. I have no references for this as far as i know this is just another one of my ignorant ideas.

How would i go on about doing that because i would very much like to have a chance to explain what i meant. Thank You