Salt gets left when oceans get landlocked and die. (Thus the big layers of salt and salt mines). So it isn't really the accumulation of the age of the earth, it

Salt gets left when oceans get landlocked and die. (Thus the big layers of salt and salt mines). So it isn't really the accumulation of the age of the earth, it's a lot less because much gets redeposited. But more generally yes, timescale.