Chinkapin oaks are members of the white oak family. Their acorns are highly sought after by deer, perhaps second in preference only to white oak.
The bark is light gray and similar in texture to white oak bark at the base of the tree. Unlike the white oak, whose bark becomes scaly toward the top of the tree, the chinkapin's bark stays uniformly "flaky" from bottom to top.
Leaves are football shaped, similar to a chestnut oak, but smaller. The ridges around the edge of the leaf end in small pointed teeth.
Chinkapin oak acorns are similar to white oak acorns but are usually smaller. The caps are warty looking and the nuts are typically yellow, brown, or black when mature. The immature acorns pictured above will grow longer and more pointed toward the tip as they mature.
If you are looking for a handy field guide that you can throw in your pack the next time you are out scouting, I recommend either or both of these books. I use both because often one will have a better photo or illustration than the other and two points of reference always helps. If you don't want to spend the cash for two books, I'd give a slight edge to the Peterson's Guide.
Next post: the Shingle Oak