Here we have a second report on the comet impact from a different locale but providing greater scope. We learn of a land of giants and another of small men all of whom survived the catastrophe itself. The last of the giants were destroyed fairly recently while the small folk remain well hidden and rarely observed.
We have an actual report that a hole opened to handle water flowing back from the lands. It appears that we have a report here from a survivor who was surely able to still fly a craft and observe the real damage. He would not have seen the hole open to allow massive amounts of water to come in from the other side but he is able to see the recovery stroke as hydro-static balance is restored between the two surfaces.
He also reports the utter destruction of populous lands generally. Recall also that at this time, the entirety of the continental shelf worldwide was usable land surface and subject to a coastal climate. This is were man lived for the preceding 35,000 years in an advanced form of society.
As I have posted on in the past, this event was targeted. Not least to shake up humanity and bring about rapid development. However it actually needed to be done in order to end the Northern Ice age..
Then came the grim dead silence and black red lit twilight of doom. Great fires and smoke rose up from the ground and men gasped for air. The land was rent asunder and swept clean by a mighty deluge of waters. A hole opened up in the middle of the land, the waters entered and it sank beneath the seas".
[ This part is astonishing. It clearly conforms to the hollow earth conjecture in which Hudson Bay acts as a conduit between the inner and outer surfaces. - arclein]
[ This last is surely Africa - arclein]