Hey Kevin..after doing a little research..and I mean very little..!! I think the question would be if they bones would be intact. With all the shelling and whathaveyou they may have been busted up pretty good.
I'll need to research the idea further but a little "artistic license" is always called for. The constant battle for what looks good and what is accurate!
Did find this little tidbit of information..
A body buried in the soil.. "within a year all that is usually left is the skeleton and teeth, with traces of the tissues on them"
Now applying that rate to a body not buried or only lightly covered with wet dirt/mud..add moisture,rats and insects..a month, two maybe???