Crawford County topographic map

The mound is located on the site of a classic astrobleme, an ancient meteorite impact structure. One of the strongest clues to the impact origin of this structure is in the pattern of disruption of sedimentary strata. In the center of the structure, strata have been uplifted several hundred feet, in much the…

Average elevation: 226 m

Average elevation: 261 m

Average elevation: 359 m

The upper Cuyahoga River, starting at 1,093 feet (333 m) over 84 miles (135 km) from its mouth, drops in elevation fairly steeply, creating falls and rapids in some places; the lower Cuyahoga River only drops several feet along the last several miles of the lower river to 571 feet (174 m) at the mouth on Lake…

Average elevation: 196 m

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Etna (formerly Carthage) is an unincorporated community and census-designated place (CDP) in Licking County, Ohio, United States. As of the 2020 census it had a population of 1,209. It lies at an elevation of 1,069 feet (326 m) at the intersection of U.S. Route 40 and State Route 310. It was listed as a…

Average elevation: 321 m

Average elevation: 212 m

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Average elevation: 263 m

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Average elevation: 267 m

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Average elevation: 239 m

Average elevation: 237 m

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Average elevation: 251 m

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Average elevation: 315 m

Average elevation: 366 m

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Average elevation: 320 m

Average elevation: 360 m