Tree age

[SPIKER]

I need to take a closer look at one of the trees I have on my place (actually it is a fench row tree but seems to be looking like one of those to me, I KNOW it is an OAK has SMALL little acorns (about size of a marble)   small leaves which are pointed & deeply cut.   I have a bark pic in my gallery I believe.

Mark M

[WDH]

Are there two sizes of leaves?  The upper ones in the sun real deeply cut and the lower ones about hand-sized in shape (or larger) and irregularly shaped?  If you dig into the bark a little bit with a knife, is the inner bark very bright yellow to yellow orange?  Does the leaves have little tufts of hairs where the leaf veins branch off the midrib when viewed from the underside?  Is the leaf petiole hairy? 

So many questions......................

When you say small leaves, how small?