World Co-ordinates 41.68806° N -87.92528 W Cook County, IL Welcome to a secluded blast from the past.... Located deep in the woods off Rt 83 and Archer Avenue is a hidden place rocked by time. Designed by Nature - the forces of wind, water, ice, and the shifting of the earth's plate sculpted and created this magnificent canyon. It is the only canyon existing in Cook County, IL. Geologically - it is dolomite limestone, a rare crystalline mineral composite of calcium magnesium carbonate. These stunning 40 ft rock canyons were exposed after glaciers retreated from the area. Yes, Chicago was once covered by ice, and yes, something happened to melt those miles of ice. But what? Estimates on age of this canyon range from 100,000 years old to 400 million. Looking into the formation of dolomite not only reveals a clue as to the forces of Nature, but also dramatically illustrates an...
