File:Zebra evaporites (Guilmette Formation, Upper Devonian; Bactrian Mountain East section, Mt. Irish Range, Nevada, USA).jpg
![File:Zebra evaporites (Guilmette Formation, Upper Devonian; Bactrian Mountain East section, Mt. Irish Range, Nevada, USA).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Zebra_evaporites_%28Guilmette_Formation%2C_Upper_Devonian%3B_Bactrian_Mountain_East_section%2C_Mt._Irish_Range%2C_Nevada%2C_USA%29.jpg/800px-Zebra_evaporites_%28Guilmette_Formation%2C_Upper_Devonian%3B_Bactrian_Mountain_East_section%2C_Mt._Irish_Range%2C_Nevada%2C_USA%29.jpg?20201115114802)
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Summary
[edit]DescriptionZebra evaporites (Guilmette Formation, Upper Devonian; Bactrian Mountain East section, Mt. Irish Range, Nevada, USA).jpg |
English: Evaporites in the Devonian of Nevada, USA.
The whitish-colored rocks seen here are evaporites in the Guilmette Formation, which in this section is a heterolithic unit having carbonates, sandstones (now "quartzites") and evaporites. Well above this particular outcrop is the Frasnian-Famennian boundary (= the last two stages of the Devonian System) - it is constrained to a bedding plane within the Guilmette Formation. The Great Basin is the only place on Earth having this contact in a carbonate succession. The Frasnian-Famennian boundary is significant because it marks one of the five greatest mass extinctions of organisms in Earth history ("The Big Five" - not a sports nerd term). Stratigraphy: upper member, Guilmette Formation, upper Frasnian Stage, lower Upper Devonian Locality: Bactrian Mountain East section - eastern shoulder of "5230 peak" at Bactrian Mountain, Mt. Irish Range, ~between the towns of Rachel and Alamo, western Lincoln County, southern Nevada, USA (vicinity of 37° 31' 42.12" North latitude, 115° 19’ 37.25" West longitude) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/49667952383/ |
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@N05/49667952383. It was reviewed on 15 November 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
15 November 2020
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current | 11:48, 15 November 2020 | ![]() | 1,280 × 960 (914 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49667952383/ with UploadWizard |
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Camera manufacturer | OLYMPUS OPTICAL CO.,LTD |
Camera model | C900Z,D400Z |
Exposure time | 1/283 sec (0.0035335689045936) |
F-number | f/3.2 |
ISO speed rating | 100 |
Date and time of data generation | 14:08, 9 December 2001 |
Lens focal length | 7 mm |
Width | 1,280 px |
Height | 960 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 02:19, 17 March 2020 |
Y and C positioning | Co-sited |
Exif version | 2.1 |
Date and time of digitizing | 14:08, 9 December 2001 |
Meaning of each component |
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Image compression mode | 1 |
APEX shutter speed | 8.129283 |
APEX aperture | 3.356144 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Date metadata was last modified | 22:19, 16 March 2020 |
Unique ID of original document | CCE2441DD1A100EB6F3721E3AC8CECC8 |
IIM version | 18,755 |