So this is an ID request from a friend of a friend of a friend...
Here's what I know:
This is a smaller ornamental tree (described as crabapple-sized), not a large shade tree that came down in Hurricane Sandy (eastern US, probably Mid-Atlantic States). Leaf measures (very approximately) 4" by 2.5". They think it had flowers. Habit-wise it is described as having a pretty broad branch spread with a gnarled appearance, trunk not straight. Was unsure about thorns or bark.
My best guess at the moment is one of the hawthorns, but I'm not sure. Hopefully someone here will have a better idea than I do...
Leaf pic posted
ETA: Just got more info on the tree. The flowers were pink, it had berries, and rough bark.
Yes, that leaf looks like it could belong to a Flowering Crabapple (Malus sp.).
There are many named selections of Flowering Crabapple - including more than a few fine ones with pink flowers which are handsomely fruited come fall. Crabapples typically develop rough bark with age.
You didn't say where the unidentified tree was located - nor whether any further images were possible. Even pictures of the tree on the ground (or of pieces of it sawed into firewood) might be worthwhile to see.
From what I understand, this is the only one that was in the area. Thanks so much for your help! I'll let them know it was a flowering crabapple. Hopefully someone at their local nursery can help them pick out a suitable replacement crabapple.