While it's usually notoriously difficult to identify a
wood species from its appearance, I think some kind of ash is a good guess.
One of the surest methods for identification (without seeing the living tree of course), is analysis of end grain under low magnification.
Ash
![](http://www.wood-database.com/wp-content/uploads/white-ash-endgrain-200x200.jpg)
Maple
![](http://www.wood-database.com/wp-content/uploads/hard-maple-endgrain-200x200.jpg)
The end grain must be sanded very smooth or planed to do properly.
Another tool to get you in the ballpark is to weigh a conveniently sized piece, scale the result up to a cubic foot and compare that to the density listed for the suspected species.
Me--- if I had a little to spare, I'd just use it in some sample, representative construction to see how it performs...