page_title: Kelleys Island, Ohio
section_title: Attractions
hierarchical_section_title: Kelleys Island, Ohio / Attractions
caption_attribution_description: Glacial grooves in Columbus Limestone (lower Middle Devonian) at Glacial Grooves State Park, northwestern Kelleys’ Island, western Lake Erie, USA. These spectacular, world-class glacial grooves were carved out during the Pleistocene (the last Ice Age). Glaciers are rivers of ice. Ice is a mineral (H2O). Glacial ice is a rock (technically, a metamorphic rock). Despite being solid, ice does flow under certain conditions at the Earth’s surface. Occasionally, Earth experiences Ice Ages, during which extensive ice sheets cover and move over significant portions of the Earth’s surface. As ice moves over landmasses, it erodes underlying rocks and picks up small to large pieces of debris. This debris accumulates at the base of the ice sheet and scrapes bedrock as the glacier moves, resulting in glacial scratches (glacial striations) (= thin scratch lines on rock) and glacial grooves (= large channels incised in rock).
context_page_description: Kelleys Island is both a village in Erie County, Ohio, United States, and the island which it fully occupies in Lake Erie. The British originally called it Sandusky Island. Later the United States took it over and officially designated it as Island Number 6 and Cunningham Island. It was renamed as Kelleys Island in 1840 by brothers Datus and Irad Kelley, who had purchased nearly the entire island.
caption: Glacial Grooves State Park, Kelleys Island. These glacial grooves were carved during the Pleistocene (the last Ice Age).
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