File:Columbus Limestone (Middle Devonian; Lafarge Kelleys Island Quarry, Kelleys Island, Lake Erie, Ohio USA) 45 (48541438671).jpg
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DescriptionColumbus Limestone (Middle Devonian; Lafarge Kelleys Island Quarry, Kelleys Island, Lake Erie, Ohio USA) 45 (48541438671).jpg |
The Columbus Limestone is a significant carbonate unit in the Middle Devonian of central and northern Ohio. It's actually part of a much more widespread sheet of Devonian carbonates that extends from New York State to the Midwest. The Columbus Limestone represents deposition in a subtropical, shallow-water, carbonate platform environment. The rocks are principally micritic limestones, fossiliferous wackestones, and fossiliferous packstones. Some chert nodules are present in the unit. Fossils are typical Paleozoic shallow marine invertebrates - favositid corals, rugose corals, stromatoporoids brachiopods, crinoids, blastoids, bryozoans, trilobites, bivalves, gastropods, cephalopods, rostroconchs, and tentaculites. Microfossils include conodonts and charophyte oogonia. Other fossils in the Columbus Limestone include vertebrates (fish), land plants (rare), and trace fossils. Some fossil horizons in the Columbus Limestone are partially silicified. Seen here is a roadside barrier block at the edge of the Lafarge Kelleys Island Quarry. The site was formerly known as the South Side Quarry and the Kellstone Quarry. It was acquired by Lafarge in 2004 and shut down in 2007. The quarry has since been allowed to flood. The bedrock here consists of Columbus Limestone. Crushed rock ("aggregate") was principally used in various construction projects on the mainland. The construction business sufficiently declined in 2007 to result in the cessation of activity here. Stratigraphy: Columbus Limestone, Eifelian Stage, lower Middle Devonian Locality: roadside barrier block along the eastern edge of Lafarge Kelleys Island Quarry (also known as the Kellstone Quarry and the South Side Quarry), western Kelleys Island, western Lake Erie, far-northern Ohio, USA (41° 36' 11.01" North latitude, 82° 43' 15.94" West longitude) |
Date | |
Source | Columbus Limestone (Middle Devonian; Lafarge Kelleys Island Quarry, Kelleys Island, Lake Erie, Ohio USA) 45 |
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@N05/48541438671 (archive). 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. |
8 October 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:24, 8 October 2019 | 4,000 × 2,727 (8.77 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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F-number | f/3.2 |
ISO speed rating | 80 |
Date and time of data generation | 16:25, 8 June 2012 |
Lens focal length | 8.295 mm |
Width | 4,000 px |
Height | 3,000 px |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 07:16, 11 August 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 16:25, 8 June 2012 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 9.3125 |
APEX aperture | 3.34375 |
APEX exposure bias | 0 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 01:16, 11 August 2019 |
Unique ID of original document | 10907CA435F5D1765D9A396E82E3C1EE |