Yes, as Phil commented, the oldness of the rock and the youth of the bear is a striking contrast. The youth brings renewed life to the old forest. Love the big ears, the better to hear you with! You must have been rather close at only 124 mm!
It is also fascinating to see how we chose to portray this adolescent bear. You photograph it mounting an outcropping of rock, surveying the surrounding landscape in search of a meal. I found this same juvenile bear poised over two juvenile wildflowers. (http://www.pbase.com/image/97668363 ) Both and young bear are comparative newcomers to the forest, while this rock in your image has been anchoring this forest since the ice age.
