i live on a small creek in central illinois and was wondering if there may be gold in it. the creek has been here for years and has a lot of shale,looks like the creek bed is all big slabs,you can see where the water has cut for years along the bank through the layers,can anyone tell me where a good place to sample from i own the land so anywhere i need to is ok,looks like the creek has cut down 60 feet or so over the years