[Lessismore]

I note that 17,500 years ago was during the last ice age -- ocean levels would have been lower,

I checked a map of continent contours at -110 meters that I think blam posted a link to. Sri Lanka is a wide, Florida-like penninsula off southeast India at that sea level.

My recollection is that -110 meters was the sea level at the last glacial maximum, about 18,000 years ago.

[blam]

Here is the map Lessismore:

Click here

I like this map.