File:Detail, Quartz-agate nodule (Killer Green Claim, Ochoco Mountains, Prineville, Oregon, USA) (33993292453) (cropped).jpg
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[edit]DescriptionDetail, Quartz-agate nodule (Killer Green Claim, Ochoco Mountains, Prineville, Oregon, USA) (33993292453) (cropped).jpg |
Quartz-agate nodule ("Thunder Egg") from Oregon, 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. "Thunder eggs" are agate-filled masses that fill former cavities in rocks (see Colburn, 2004 for more info.). Locality: Killer Green Claim, near Prineville, Ochoco Mountains, central Oregon, USA) Reference cited: Colburn (2004) - The Formation of Thundereggs (Lithophysae). 493 pp. (<a href="http://www.cvmineralclub.org/MAIN/Pages/Members Articles/Jack Marcy/The Formation of Thundereggs-Revised 2004.pdf" rel="nofollow">www.cvmineralclub.org/MAIN/Pages/Members%20Articles/Jack%...</a>) (This long document may take a little while to load on your computer.) |
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Source | Quartz-agate nodule (Killer Green Claim, Ochoco Mountains, Prineville, Oregon, USA) | |||
Author | James St. John | |||
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current | 15:01, 25 March 2020 | ![]() | 1,332 × 1,067 (1.25 MB) | Tibet Nation (talk | contribs) | File:Quartz-agate nodule (Killer Green Claim, Ochoco Mountains, Prineville, Oregon, USA) (33993292453).jpg cropped 52 % horizontally, 53 % vertically using CropTool with lossless mode. |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/50 sec (0.02) |
F-number | f/3.5 |
ISO speed rating | 80 |
Date and time of data generation | 10:34, 6 May 2017 |
Lens focal length | 9.681 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 | 13:45, 21 May 2017 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 10:34, 6 May 2017 |
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APEX aperture | 3.625 |
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File source | Digital still camera |
Custom image processing | Normal process |
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White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 09:45, 21 May 2017 |
Unique ID of original document | B840F0BDBCFF4538B2397701A6AD9DB7 |
IIM version | 18,755 |