Buzsaw
1. The mountains were allegedly not original but created by tectonic plate uplift etc and are still high, indicative of no significant desintigration as your model purposes.
This is interesting. First off,how high were the mountains allegedly and how do you know this?
Second,how much energy was expended in the making of the mountains? This can be determined by assessing how much uplift occurred in what time frame. Is it possible for that uplift in that time frame to be accomplished?
Now comes the crux of the issue.where did the sand come from in the scenario of tectonic uplift?
. How is your model any more viable than mine which depicts an undeterminate timeperiod of soupy mix on earth being churned by seismic activity etc so as to grind up the rocks & pebbles into sand etc?
How did the rock get transformed into sand beneath water and why does it only show on certain shores and not others?