Glacial Grooves State Memorial

October 15, 2015

Kellys island 118 (1)

Photographer: Dal Taylor
Summary AuthorDal Taylor
This glacial trough formed some 18,000 years ago on the north side of what is now Kelleys Island, Ohio, as glacial ice scoured limestone bedrock during the last ice age. It's approximately 400 ft (128 m) long, 35 ft (11 m) wide and 10 ft (3 m) deep. The direction of flow can be seen by examining the glacial grooves -- it's from north to south here. Devonian limestone containing the grooves holds marine fossils that are 350 to 400 million years old. Note that fencing now protects this landmark. A walkway and stairs give visitors a good view of the grooves. Photo taken on August 15, 2015.

Photo Details: Camera Model: Canon PowerShot SX50 HS; Focal Length: 14.654mm; Aperture: ƒ/5.0; Exposure Time: 0.0020 s (1/500); ISO equiv: 80; Software: Microsoft Windows Photo Viewer 6.1.7600.16385.