File:"Turritella Agate" (chertified fossiliferous lacustrine limestone) (Laney Member, Green River Formation, Middle Eocene; North Barrel Springs Draw, south of Wamsutter, Wyoming, USA) 2 (25400772916).jpg
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Description"Turritella Agate" (chertified fossiliferous lacustrine limestone) (Laney Member, Green River Formation, Middle Eocene; North Barrel Springs Draw, south of Wamsutter, Wyoming, USA) 2 (25400772916).jpg |
"Turritella Agate" - fossiliferous lacustrine chert in the Eocene of Wyoming, USA. This is a sample of Wyoming's famous "Turritella Agate" in the Green River Formation. It consists of richly fossiliferous dark chert with abundant Elimia tenera gastropods (misnamed "Turritella" by rockhounds). This is fossiliferous limestone that has been chertified. This fossil snail horizon was deposited in an ancient lake environment, as was the rest of the Green River Formation. Classification of Elimia fossil snails: Animalia, Mollusca, Gastropoda, Cerithioidea, Pleuroceridae Stratigraphy: base of Hartt Cabin Bed, Laney Member, Green River Formation, Middle Eocene Locality: loose piece west of Delaney Rim Road, northern side of North Barrel Springs Draw, ~21 km south-southwest of Wamsutter, Wyoming, USA (vicinity of 41° 29' 19.60" North latitude, 108° 04' 06.05" West longitude) |
Date | |
Source | "Turritella Agate" (chertified fossiliferous lacustrine limestone) (Laney Member, Green River Formation, Middle Eocene; North Barrel Springs Draw, south of Wamsutter, Wyoming, USA) 2 |
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@N05/25400772916 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 December 2019
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current | 02:02, 6 December 2019 | 3,484 × 1,888 (4.16 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Exposure time | 1/320 sec (0.003125) |
F-number | f/10 |
ISO speed rating | 80 |
Date and time of data generation | 11:29, 2 August 2012 |
Lens focal length | 9.681 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 21:48, 1 March 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:29, 2 August 2012 |
Meaning of each component |
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APEX shutter speed | 8.3125 |
APEX aperture | 6.65625 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash did not fire, auto 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 | Portrait |
Supported Flashpix version | 1 |
Image width | 3,484 px |
Image height | 1,888 px |
Date metadata was last modified | 16:48, 1 March 2016 |
IIM version | 2 |