File:Slickenlined-fault surface in limestone (Upper Mercer Member, Middle Pennsylvanian; Rock Cut, Muskingum County, Ohio, USA) 1 (37366731831).jpg
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Summary
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| Description |
Fault in limestone in the Pennsylvanian of Ohio, USA. Faults are fractures or fracture systems in rocks along which there has been differential displacement. Fault movement is usually in the form of sudden jolts. Such events release energy in the form of shock waves, which are the cause of earthquakes. Faults form by extensional stress (stretching) or compressional stress (pushing together) or shear stress (ripping/tearing). Fault surfaces are often polished by the grinding action of the movement - such surfaces are referred to in geology by the horrible term "slickensides". Many fault surfaces have thin, straight scratches or deeper grooves, formed by gouging during fault movement. These linear scratches are called slickenlines. Shown above is a slickenlined fault surface developed in gray limestone in the Pennsylvanian of eastern Ohio. Stratigraphy: Upper Mercer Member, Pottsville Group, lower Atokan Stage, lower Middle Pennsylvanian Locality: Rock Cut railroad cut - outcrop & talus along the Ohio Central Railroad tracks (west of milepost 134), ~southwest of Copeland Island & south-southeast of the town of Dresden, northern Muskingum County, eastern Ohio, USA (~vicinity of 40° 04’ 24.41” North latitude, ~81° 59’ 11.25” West longitude) |
| Date | |
| Source | Slickenlined-fault surface in limestone (Upper Mercer Member, Middle Pennsylvanian; Rock Cut, Muskingum County, Ohio, USA) 1 |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/37366731831. It was reviewed on 8 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:07, 8 October 2019 | | 4,000 × 2,531 (5.5 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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