I remember reading somewhere that the Earth is constantly bombarded by small space debris, and that this debris increases the amount of water on the Earth by about 40 tons per day. Does anyone else remember seeing that?
Maybe they were talking about this thing called rain, it’s gazillions of tiny droplets of water that fall from the sky to the ground. However rain does not add any net “new” water to earth.
Sorry for being so sarcastic - it was not directed “at” you - it was just too inviting an opportunity to pass up for a little attempt at sarcastic humor.
I’ve read that carbonaceous chondrites can have up to 22% water and that during the early post “great thwack” formation of the moon period they rained down, bombarded, the early earth. They were formed from the dust in the region of earth. However, I can’t recall the D/H composition.