Ridgemont quarry north
Ontario Geological Survey
July 05, 2018
Near Beaver Island, NY
42.921° N, 79.014° W
Ridgemont quarry north
cherty, argillaceous limestone of Bois Blanc Fm (BB) unconformably overlying Bertie Fm (BE), with glauconite at contact (arrows)
Main photo: Bois Blanc (BB) Fm unconformably (arrows) overlying Bertie Fm; Bertie members are: A = Akron, W = Williamsville, S = Scajaquada, F = Falkirk (contacts = white lines)
