The area north of the City of Peterborough contains a fascinating array of natural geological heritage features that span a billion years. Ken Lyon, hydrogeologist and PFN member, will introduce rocks of the core of ancient Canadian Shield mountains, plate tectonics and limestones and fossils of the shallow warm Ordovician seas, and Pleistocene drumlins and other physiographic features left by the glaciers. Ken is a graduate of Princeton and Queen’s Universities and a charter member of Professional Geoscientists Ontario. A complementary half-day field trip is being organized for Saturday, Oct. 5.