Note: This is an Earthcache. There is no physical cache to find. Logging this Earthcache requires that you undertake an educational task relating to the specific Earth Science at the site.
Prior to logging this cache, click on Message this owner, or send an email with answers to the following questions:
- In what direction was this glacier moving? (What direction do the grooves run?
- Estimate approximate sq ft of glacially exposed rock. (Average length X average width.)
- From the surrounding area, how thick do you think the soil is on top of the rest of this rock?
- Required to log this cache: Please provide a photo of yourself or a personal item in the picture to prove you visited the site. Upload the photo with your log.
East Harbor State Park
There is no admission fee for entrance to Ohio State Parks. When entering this park, follow the signs for the campground. Tell the campground attendant (if present) that you are going to view the glacial grooves.
The best example of glacial grooves is on Kelleys Island. If you do not have the time or money to go to the island, East Harbor State Park has a good example of glacial grooves. There is a patch of limestone in the middle of a grassy area that has scratches and shallow grooves from the Wisconsinian Glacier, and could have been produced as recently as 10,000 to 12,000 years ago. It has been estimated that this glacier was well over one mile thick.
Glacial Striations are grooves and scratches on a bedrock surface that were produced by the movement of a glacier with hard granite-like boulders and gravel attached to the bottom of it. The orientation of the striations will tell you what direction the glacier was moving.
