It will compost where it sits, I think.
I've got a lot more to chip, as well.
The soil on my property is quite thin (there are several spots with ledge showing, and much of what is there is crappy fill -- where I dug the foundation for the mudroom addition I did about 14 years ago, there was about 18" deep of so-called clink which is the slag from the coke furnaces at the Maynard mill. There was also the wire frame of a mattress, and the steel frame of a baby carriage rusting in the bony gravel that made up most of the rest of the dirt.