@farmerman,
farmerman wrote: You apparently had been reading at least one of the works that I recommended many moons ago.
I apparently didn't do anything of the kind.
I use the computational functionality of the present day technology lead by the search engines ... but it doesn't matter 'How?' for the much more interesting question is 'What?'
If you, FM, are really reading the thick books for so long as you claim, what have you read there?
I don't have enough knowledge to comment why everything in the SS is 4.54 BN years old - even the comets coming from the Oort cloud ... but the theory claims that the Earth has cooled very fast, some 100 MN years after the Moon impact - so you have 4.54 BN minus 100 MN ... to have the rocks of the right type. Now follow this - the zirconium crystals contain microscopic inclusions, such as gas bubbles, that provide a unique window into the conditions on Earth ... showing that there has not been enough hydrogen and water content into the air and into the rocks to form the oceans as we know them today, which automatically means that you don't have even the vaguest idea where did all this water on the Earth come from ... and why doesn't the Moon have pro rate water content?
Just don't tell me that the Moon has lost its water with the time, for if this is true you may find out what will happen with the water on the Earth some day.