I predict that the time for catastrophic event (Tsunami or similar) for Dholavira soil layer (discussed in these articles) would be around 5600 BCE!
I said it here, on 9 September 2016.
(Newspaper articles posted below are copied from FB wall of Shri Rajeev Ranjan)
The articles refer to functioning Dholavira from 5000 BCE to about 3500 BCE.
Of course, there is a huge risk in stating a specific time period (5600 BCE) when the soil layers could have been created by one of the many catastrophic events that area of Dholavira would have faced in its ancient existence.
Still, I have my reasons…