Breadcrumb Photo Gallery Lake Michigan Limestone Shelves, Door Peninsula Limestone Shelves, Door Peninsula Last updated by System administrator November 16, 2008 Underwater fractured limestone shelves, off the east shore of the Door Peninsula near Rock Island, a reminder of the challenges and hazards of cruising this coast. Jim Caraway photo... Become a Member How to Join Member Benefits & Discounts Membership Application About the GLCC A Bit of History Contact Us Active forum topics Tuesday in the GLCCSchool – Cruising the Remote Waters of Northern Georgian BayWednesday in the GLCCSchool - Lithium Battery Technology for Cruising BoatersThursday in the GLCCSchool – Wilderness Cruising Lake Superior’s Isle Royale Meet the Matleys: The Club is core to their cruisingWelland Canal CaptainMore