How likely is it that I can find fossils in mid-Michigan glacial moraines?

I live near the Kennsington valley where large glacial deposits of small rocks and gravel can be found on hiking trails and in my back yard. I have found basalt and granite mostly. How likely is it that I will find limestone? How old are these rocks (from what epoch?) How likely is it that I will find fossils in the dirt in this area? Did the glaciers destroy most of the fossils on the way?