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Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA

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Ohio Shale Concretion, Columbus, Ohio

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
Sulfide / Pyrite / Marcasite Concretion in Shale, Glen Echo Ravine, Columbus, Ohio

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
Pyrite Concretion in Shale as found, July 2013

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
Ohio Shale Concretion, Columbus, Ohio

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
Sulfide / Pyrite / Marcasite Concretion in Shale, Glen Echo Ravine, Columbus, Ohio

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
Pyrite Concretion in Shale as found, July 2013

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
Ohio Shale Concretion, Columbus, Ohio

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
Sulfide / Pyrite / Marcasite Concretion in Shale, Glen Echo Ravine, Columbus, Ohio

Glen Echo Ravine, Columbus, Franklin Co., Ohio, USA
 
Latitude & Longitude (WGS84): 40° 1' 9'' North , 82° 59' 55'' West
Latitude & Longitude (decimal): 40.01917,-82.99861


Glen Echo Ravine is one of a series of ravines that drain into the Olentangy River in the City of Columbus. All of these ravines cut into the Ohio Shale, found in the Devonian bedrock exposed in a strip in the center of Ohio, running from Adams/Scioto counties in the south, up through the heavily populated counties along the shore of Lake Erie.

Sources describing minerals in the Ohio Shale in the northern part of the state can be applied to the Ohio Shale in general: it is a similar geology. Thus a similar pattern of mineralized concretions (containing ferroan dolomite, calcite, quartz, barite, and aragonite), pyrite disks, and mineral efflorescences (alunogen, botryogen, copiapite, epsomite, gypsum, hexahydrite, melanterite, ferroan pickeringite, and rozenite) can be found in central Ohio exposures of the Ohio shale. In addition, chert nodules weathered out of limestone can be found in the stream beds.

Glen Echo ravine runs about 2.5 miles from I-71 west to the Olentangy River. It is easily accessible at Glen Echo Park (the lat/long below). Bridges and tunnels make exploration of the Ravine a bit difficult, but it is possible to walk most of the ravine down to the Olentangy River.

Efflorescences, cone-in-cone calcite, and pyrite are found in the upper part of the Ravine, near Glen Echo Park. Between Indianola Ave. and High St. mineralized concretions can be seen, some as large as 6 feet across. Pyrite disks or "suns" can also be found between plates of the shale in the middle and lower part of the Ravine.

This is an urban site, so be prepared for a bit of graffiti, ne'er-do-well teenagers, junk, and the occasional homeless person living in a tent.

Mineral List


16 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Devonian
358.9 - 419.2 Ma
Ohio Shale

Age: Devonian (358.9 - 419.2 Ma)

Stratigraphic Name: Ohio Shale

Description: Shale; brownish black to greenish gray, weathers brown; carbonaceous to clayey, laminated to thin bedded, fissile parting; carbonate and/or siderite concretions in lowermost 50 feet; petroliferous odor; 250 to 500+ feet thick. Includes Olentangy Shale south of central Delaware Co.

Lithology: Major:{shale,black shale}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Barth, Vincent D. (1974), "Formation Of Concretions Occurring in the Ohio Shale along the Olentangy River." Ohio Journal of Science: 75(3).

Carlson, Ernest H. (1991), Minerals of Ohio. Ohio Department of Natural Resources.

Carlson, Ernest H. (2002), Jerret Whitford. "Occurrence And Mineralogy Of Efflorescence In Late Devonian Black Shales, North-Central Ohio." 2002 GSA Meeting.

Carlson, Ernest H. et al (2009), "Mineralogy And Paragenesis Of Large Dolostone Septaria in the Late Devonian Huron Shale, North-Central Ohio." Rocks and Minerals: 84 (March/April).

Vasichko, Joe, Septarian Minerals of the Huron River near Lamereaux Road Bridge, Monroeville, Huron Co., Ohio.

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