File:Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 6 (30235221423).jpg
![File:Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 6 (30235221423).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Bedford_Coal_%28Middle_Pennsylvanian%3B_Noland_Tunnel%27s_north_portal_outcrop%2C_Tunnel_Hill%2C_Coshocton_County%2C_Ohio%2C_USA%29_6_%2830235221423%29.jpg/800px-Bedford_Coal_%28Middle_Pennsylvanian%3B_Noland_Tunnel%27s_north_portal_outcrop%2C_Tunnel_Hill%2C_Coshocton_County%2C_Ohio%2C_USA%29_6_%2830235221423%29.jpg?20170624172438)
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[edit]DescriptionBedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 6 (30235221423).jpg |
This is an exposure of the Pottsville Group, a Pennsylvanian-aged cyclothemic succession containing nonmarine shales, marine shales, siltstones, sandstones, coals, marine limestones, and chert ("flint"). The lower Pottsville dates to the late Early Pennsylvanian. The upper part dates to the early Middle Pennsylvanian. The Lower-Middle Pennsylvanian boundary is apparently somewhere near the Boggs Member (?). The ledge in the middle and bottom of the photo is the Bedford Coal, a horizon that occurs just below the Upper Mercer Limestone (or Upper Mercer Flint). Lithologically, the Bedford ranges from carbonaceous shale to argillaceous coal to bituminous coal to cannel coal. The cannel coal in the Bedford was targeted for mining in the 1800s as a source of fuel. It was particularly useful in the manufacture of kerosene, an illuminating fuel. After the petroleum industry started in the 1860s, production of kerosene from cannel coal essentially ceased. In this outcrop, the Bedford Coal consists of cannel coal and bituminous coal. Stratigraphy: Bedford Coal, upper Pottsville Group, Atokan Stage, lower Middle Pennsylvanian Locality: Tunnel Hill North Portal Outcrop (= Noland Tunnel's northern portal), ~1.75 air miles north-northeast of the town of Tunnel Hill, western Coshocton County, eastern Ohio, USA (~40° 16’ 33.27” North latitude, ~82° 01’ 53.04” West longitude) |
Date | |
Source | Bedford Coal (Middle Pennsylvanian; Noland Tunnel's north portal outcrop, Tunnel Hill, Coshocton County, Ohio, USA) 6 |
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@N05/30235221423. 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 | 17:24, 24 June 2017 | ![]() | 4,000 × 3,000 (4.68 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/20 sec (0.05) |
F-number | f/4 |
ISO speed rating | 80 |
Date and time of data generation | 10:22, 26 November 2014 |
Lens focal length | 11.614 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 21:23, 8 November 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 10:22, 26 November 2014 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 4.3125 |
APEX aperture | 4 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
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 | Landscape |
Supported Flashpix version | 1 |
Image width | 4,000 px |
Image height | 3,000 px |
Date metadata was last modified | 16:23, 8 November 2016 |
IIM version | 2 |