File:Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 1 (31828317562).jpg
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Summary
[edit]DescriptionNellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton County, Ohio, USA) 1 (31828317562).jpg |
Flint (chert) from the Pennsylvanian of Ohio, USA. (~9.8 cm across at its widest) "Flint" is the official gemstone of Ohio. Flint is actually chert (the two terms are synonymous, despite what anyone else might say), a cryptocrystalline, quartzose sedimentary rock. High-quality, colorful, multicolored, and multipatterned flint is moderately common at some Ohio localities. A couple famous flint occurrences in east-central Ohio include the Vanport Flint at Flint Ridge and Nellie Blue Flint in Coshocton County. Nellie Blue Flint is essentially restricted to the Nellie area of Coshocton County. It consists of attractive, frequently complexly-patterned, dark bluish to bluish-black chert. Fractures and cavities (vugs) are often present and have been filled or nearly filled with pale bluish-gray chalcedony and/or megaquartz (= visible hexagonal quartz crystals). Body fossils and trace fossils can be present. Nellie Blue is a local color variant of the Upper Mercer Flint, which is usually a black flint with whitish speckles (= often body fossils and fossil fragments). The Upper Mercer Flint is a somewhat persistent horizon of chertified marine fossiliferous limestone in east-central and eastern Ohio called the Upper Mercer Limestone. Stratigraphy: Upper Mercer Flint (= chertified Upper Mercer Limestone), upper Bedford Cyclothem, upper Pottsville Group, Atokan Series, lower Middle Pennsylvanian Locality: at or near the town of Nellie, western Coshocton County, east-central Ohio, USA |
Date | |
Source | Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; Nellie area, Coshocton 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@N05/31828317562. It was reviewed on 24 June 2017 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
24 June 2017
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current | 17:28, 24 June 2017 | 3,732 × 2,097 (5.61 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/9 |
ISO speed rating | 80 |
Date and time of data generation | 02:20, 30 December 2016 |
Lens focal length | 7.23 mm |
Image title | |
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 13.0 (Macintosh) |
File change date and time | 03:51, 30 December 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 02:20, 30 December 2016 |
Meaning of each component |
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APEX shutter speed | 5.90625 |
APEX aperture | 6.34375 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
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Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
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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 | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 22:51, 29 December 2016 |
Unique ID of original document | EC401CF12CF735E81A912D2161BC86CA |