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Kelley's Island Glacial Grooves Photographs

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Title	Kelley's Island Glacial Grooves Photographs
Subject	Geography and Natural Resources Rocks Glaciers
Place	Kelley's Island (Ohio) Ottawa County (Ohio)
Description	Five photographs document the glacial grooves found on Kelley's Island as they looking in the 1930s or 1940s. The photographs measure 6" x 3.5" (15.24 x 8.09 cm). The glacial grooves on the north side of Kelley's Island are the largest easily accessible such grooves in the world. They were scoured into solid limestone bedrock about 18,000 years ago by the great ice sheet that covered part of North America. Remaining today is a trough that measures 400-feet long, 35-feet wide, and up to 10-feet deep. The ice, probably hundreds of feet thick, flowed from the north in what is now the Lake Erie basin. The Devonian limestone containing the grooves contains marine fossils that are 350 to 400 million years old. Many other grooves were quarried away during the nineteenth and twentieth centuries.
Creator	Ohio Historical Society. Division of State Memorials
Date of Original	1930s - 1940s circa
Collection	Historic Sites/ Let's Explore Ohio Photographs http://www.ohiohistory.org/places/glacial/ (for more information on glacial grooves)
Source	Audiovisual material; State Archives Series 6560 AV
Format	picture
Submitting Institution	Ohio Historical Society
Rights	Online access is provided for research purposes only. For rights and reproduction requests or more information, go to http://www.ohiohistory.org/images/information
Type	StillImage
Date created	2010-06-04

Title	Om3274_6059734_001
Rights	Online access is provided for research purposes only. For rights and reproduction requests or more information, go to http://www.ohiohistory.org/images/information
File Name	Om3274_6059734_001.tif
Image Height	934
Image Width	1684
File Size	532.445 KB
Date created	2009-01-09

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Kelley's Island Glacial Grooves Photographs

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