File:Teepee Canyon Agate (Teepee Canyon, South Dakota, USA) 11 (32785946445).jpg
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editDescriptionTeepee Canyon Agate (Teepee Canyon, South Dakota, USA) 11 (32785946445).jpg |
Agate ("Teepee Canyon Agate") from the Black Hills of South Dakota, USA. (public display, South Dakota School of Mines Museum of Geology, Rapid City, South Dakota, USA) "Agate" is a rockhound/collector term for cavities in rocks (usually sedimentary rocks such as limestone or igneous rocks such as basalt) that have been partially or completely filled with irregularly concentric layers of microcrystalline, fibrous quartz (chalcedony - SiO2). Agate is quartz. Teepee Canyon Agate is derived from limestones of the Minnelusa Formation (Upper Pennsylvanian to Lower Permian), which outcrops in the Black Hills. Locality: Teepee Canyon, Black Hills, Custer County, western South Dakota, USA |
Date | |
Source | Teepee Canyon Agate (Teepee Canyon, South Dakota, USA) 11 |
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@N05/32785946445 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
10 October 2019
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current | 07:13, 10 October 2019 | ![]() | 2,640 × 2,388 (1.88 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 | 1/100 sec (0.01) |
F-number | f/4 |
ISO speed rating | 125 |
Date and time of data generation | 11:37, 25 May 2012 |
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 | 20:57, 30 October 2014 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:37, 25 May 2012 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 6.65625 |
APEX aperture | 4 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
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 | Standard |
Supported Flashpix version | 1 |
Image width | 2,640 px |
Image height | 2,388 px |
Date metadata was last modified | 16:57, 30 October 2014 |
IIM version | 2 |