File:Weathered lacustrine oil shale (North Horn Formation, Cretaceous-Tertiary; Wales Spring, San Pitch Mountains, Utah, USA) 1.jpg
![File:Weathered lacustrine oil shale (North Horn Formation, Cretaceous-Tertiary; Wales Spring, San Pitch Mountains, Utah, USA) 1.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Weathered_lacustrine_oil_shale_%28North_Horn_Formation%2C_Cretaceous-Tertiary%3B_Wales_Spring%2C_San_Pitch_Mountains%2C_Utah%2C_USA%29_1.jpg/745px-Weathered_lacustrine_oil_shale_%28North_Horn_Formation%2C_Cretaceous-Tertiary%3B_Wales_Spring%2C_San_Pitch_Mountains%2C_Utah%2C_USA%29_1.jpg?20201201223737)
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[edit]DescriptionWeathered lacustrine oil shale (North Horn Formation, Cretaceous-Tertiary; Wales Spring, San Pitch Mountains, Utah, USA) 1.jpg |
English: Oil shale from the Cretaceous-Tertiary of Utah, USA.
Oil shales, also known as kerogen-rich marlstones or kerogenites, are organic-rich, fine-grained, sedimentary rocks. With burial and heating, the dark organic matter of oil shale is converted to blebs of petroleum. Petroleum then migrates out from the rock and through its sedimentary basin, usually upward and updip along fractures and bedding planes. Finally, petroleum accumulates in reservoir rocks that have significant porosity - typically sandstones. All petroleum (oil and natural gas) in the world was originally organic matter in sources rocks such as oil shales. As global demand for petroleum continues to exceed supply (Earth is obscenely overpopulated), non-traditional sources of petroleum will increasingly be seen as attractive mining targets. America has significant oil shale deposits - the largest occurrence is the Eocene-aged Parachute Creek Member of the Green River Formation. The Green River Formation is also famous for beautifully preserved fish fossils. Seen here is an oil shale sample from Utah's North Horn Formation, which is older than the Green River Formation. Stratigraphy: ~middle North Horn Formation, Maastrichtian Stage to Danian Stage, uppermost Cretaceous to lowermost Paleocene Locality: Wales Spring, ~1/3 of the way between Wales Gap (to the east) and 7803' summit (to the west) along Chicken Creek Road, eastern slopes of the Gunnison Plateau / San Pitch Mountains, northwestern Sanpete County, central Utah, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/50667578896/ |
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@N05/50667578896. It was reviewed on 1 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
1 December 2020
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current | 22:37, 1 December 2020 | ![]() | 3,200 × 2,577 (5.33 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50667578896/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/10 |
ISO speed rating | 80 |
Date and time of data generation | 19:54, 30 November 2020 |
Lens focal length | 9.681 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 18.0 (Macintosh) |
File change date and time | 03:40, 1 December 2020 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 19:54, 30 November 2020 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.65625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
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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 | 22:40, 30 November 2020 |
Unique ID of original document | C51E30242AA952BE12FCD297006466C8 |