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  2. Geology of Ohio - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Ohio

    Ohio produces three billion dollars worth of natural gas and $844 million of oil annually. Coal deposits were first recognized in the 1740s by early settlers and were mapped as early as 1752. Decreased demand due to increased natural gas production has reduced coal mining in the 2010s, although one underground mine and three surface mines ...

  3. List of U.S. state minerals, rocks, stones and gemstones

    en.wikipedia.org/wiki/List_of_U.S._state...

    In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...

  4. Cleveland Shale - Wikipedia

    en.wikipedia.org/wiki/Cleveland_Shale

    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) thick. [9] It is thickest around the Rocky River north of Berea, Ohio, and thins to the east, west, and south. [9] The Cleveland Shale is found in east-central ...

  5. Ohio Department of Natural Resources - Wikipedia

    en.wikipedia.org/wiki/Ohio_Department_of_Natural...

    ODNR regulates Ohio's oil and gas industry, the mining industry, hunting and fishing, and dams while maintaining natural resources such as state parks, state nature preserves, state wildlife areas, state forests, and state waterways. It was created in 1949 by the Ohio Legislature. [3]

  6. Mineral, Ohio - Wikipedia

    en.wikipedia.org/wiki/Mineral,_Ohio

    Mineral is an unincorporated community in Athens County, Ohio, United States. [1] Centered on State Route 356 , it was established as a coal mining community. It is located on Mud Lick Run, which flows into nearby Hewitt Fork, a tributary of Raccoon Creek .

  7. Crystal Cave (Ohio) - Wikipedia

    en.wikipedia.org/wiki/Crystal_Cave_(Ohio)

    The Crystal Cave is a limestone cave located in Put-in-Bay, Ohio, located on South Bass Island in Lake Erie. [1] In 1887, Gustav Heineman emigrated from Baden-Baden, Germany, to Put-in-Bay, Ohio, where he established a winery. In 1897 he dug a well beneath his winery and discovered a large vug at a depth of 30 feet (9.1 m).

  8. Mineral Ridge, Ohio - Wikipedia

    en.wikipedia.org/wiki/Mineral_Ridge,_Ohio

    Mineral Ridge is an unincorporated community and census-designated place in southern Trumbull and northern Mahoning counties in the U.S. state of Ohio. The population was 3,951 at the 2020 census. [4] It is a suburb in the Youngstown–Warren metropolitan area. Mineral Ridge was named for valuable coal deposits near the original town site. [5]

  9. Wayne National Forest - Wikipedia

    en.wikipedia.org/wiki/Wayne_National_Forest

    The Wayne National Forest is located in the Appalachian part of the US state of Ohio, in the Unglaciated Allegheny Plateau.It is the first and only national forest in Ohio. . Forest headquarters are located between The Plains and Nelsonville, Ohio, on US Route 33 overlooking the Hocking Riv