This is the 10th volume in the roadside series. Here you will explore the bedrock geology of the Sudbury Ontario area.I try to avoid outcrops that appear in other guidebooks, but some are included. I did not include any outcrops at mines as they are very well covered in other publications. I didn't want this to be a revamp of other guidebooks. Also covered is the crossover from the Superior Craton crossing the Grenville Front.