File:Four Corners Mine (Dakota Hogback, southwest of Denver, Colorado, USA) 2.jpg
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![File:Four Corners Mine (Dakota Hogback, southwest of Denver, Colorado, USA) 2.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/3/36/Four_Corners_Mine_%28Dakota_Hogback%2C_southwest_of_Denver%2C_Colorado%2C_USA%29_2.jpg/800px-Four_Corners_Mine_%28Dakota_Hogback%2C_southwest_of_Denver%2C_Colorado%2C_USA%29_2.jpg?20230222225714)
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[edit]DescriptionFour Corners Mine (Dakota Hogback, southwest of Denver, Colorado, USA) 2.jpg |
English: The opening is the Four Corners Mine, an old uranium mine in the Dakota Hogback's Turkey Creek Watergap, southeast of the town of Morrison, Colorado. The host rocks are sandstones of the J Sandstone of the South Platte Formation (Dakota Group, Lower Cretaceous). The uranium in the mine ultimately came from nearby pegmatitic granites. The Four Corners Mine was active in the 1950s. It targeted uranium roll front mineralization, an excellent example of which is exposed in a roadcut on the other side of the watergap (behind the viewer here). In additional to uranium (U), the mine also produced vanadium (V) and molybdenum (Mo).
Locality: northern side of Turkey Creek Road through Turkey Creek Watergap, southeast of the town of Morrison, Jefferson County, north-central Colorado, USA (39° 38' 02.98" North latitude, 105° 10' 20.06" West longitude) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/52702958371/ |
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@N05/52702958371. It was reviewed on 22 February 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
22 February 2023
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:57, 22 February 2023 | ![]() | 3,008 × 1,746 (3.88 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52702958371/ with UploadWizard |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/320 sec (0.003125) |
F-number | f/9 |
ISO speed rating | 500 |
Date and time of data generation | 12:12, 26 July 2007 |
Lens focal length | 40 mm |
Width | 3,008 px |
Height | 2,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 20.0 (Macintosh) |
File change date and time | 14:05, 21 February 2023 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 12:12, 26 July 2007 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 8.321928 |
APEX aperture | 6.33985 |
APEX exposure bias | 0 |
Maximum land aperture | 4.3 APEX (f/4.44) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 10 |
DateTimeOriginal subseconds | 10 |
DateTimeDigitized subseconds | 10 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 60 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 1004a0cc |
Lens used | 18.0-200.0 mm f/3.5-5.6 |
Date metadata was last modified | 09:05, 21 February 2023 |
Unique ID of original document | 67994E147C2E49422ABA51028DAA883C |
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26 July 2007
0.003125 second
40 millimetre
500
image/jpeg
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