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The Cleveland Shale is a shale geologic formation in Ohio in the United States. The Cleveland Shale underlies much of northeast Ohio in beds of varying thickness. In northeast Ohio, the member does not appear east of the Grand River. [7] Measurements taken in northeast Ohio show the Cleveland Shale to be 7 feet (2.1 m) [7] to 100 feet (30 m ...
The shale is composed of extremely fine bits of quartz, clay and mica deposited at the edge of a sea. Ripple marks created by the sea's wave action are visible in the shale. The Cleveland shale is less resistant to erosion than the overlying Berea sandstone, so the creek was able to scour its impressive gorge once it had penetrated the ...
Chagrin shale is blue gray in color, an offshore alluvial, silt shale of the Devonian period. This layer is found below about 800 feet (240 m) msl. The next layer is Cleveland shale. This is a black shale that is an important source of local fossils. Cleveland Shale is found in the Chagrin River valley between 800 and 900 feet (270 m) msl.
English: A thick sequence of Cleveland Shale is exposed at Fort Hill near Cedar Point along the north bank of the Rocky River in North Olmstead, Ohio. This exposure is easily viewed from an observation deck at the Rocky River Nature Center.
The Chagrin Shale is a gray [5] or greenish-gray [6] argillaceous shale [5] consisting of gray siltstone, silty gray shale, soft gray clay shale, and (uncommonly) grayish-black shale. [7] The primary minerals in the shale are chlorite, illite, kaolinite, and quartz. [6] Thin to massive beds [8] of siltstone and sandstone are common. [6]
Euclid Creek near the intersection of Metropark Blvd. and Highland Road in 1913. The creek has exposed about 70 feet (21 m) of the Chagrin Shale, topped by about 5 feet (1.5 m) of the Cleveland Shale. Euclid Creek flows over bedrock more than 360 million years old. [6]
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Cleveland Shale Chagrin Formation Huron Shale: Underlies: ... The Ohio Shale is a geologic formation in Ohio. It preserves fossils dating back to the Devonian period.