File:Southern San Rafael Fremont Indian petroglyphs (~400 to ~1350 A.D.) (Capitol Reef National Park, southern Utah, USA) 6 (22862194656).jpg
Original file (2,677 × 1,372 pixels, file size: 3.36 MB, MIME type: image/jpeg)
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Summary
editDescriptionSouthern San Rafael Fremont Indian petroglyphs (~400 to ~1350 A.D.) (Capitol Reef National Park, southern Utah, USA) 6 (22862194656).jpg |
Bighorn sheep - Southern San Rafael Fremont Indian petroglyphs (~400 to ~1350 A.D.) on desert varnish-covered quartzose sandstone (Wingate Sandstone, Lower Jurassic) in Utah. The reddish portions of the rock face are desert varnish - a mineral-encrusted rock surface that is common in many desert settings. Desert varnish is composed of clay minerals and red-colored hematite (Fe2O3 - iron oxide). Some desert varnish surfaces are blackish-colored from manganese oxide minerals (for example, birnessite - www.mindat.org/min-680.html). Scraping or hammering away at the desert varnish exposes the light-colored sandstone. Locality: cliff face ~0.4 kilometers northeast of the Sulphur Creek-Fremont River confluence, Capitol Reef National Park, southern Utah, USA |
Date | |
Source | Southern San Rafael Fremont Indian petroglyphs (~400 to ~1350 A.D.) (Capitol Reef National Park, southern Utah, USA) 6 |
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@N05/22862194656. It was reviewed on 3 December 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 December 2015
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current | 21:36, 3 December 2015 | 2,677 × 1,372 (3.36 MB) | Basilicofresco (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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ISO speed rating | 200 |
Date and time of data generation | 17:47, 2 September 2011 |
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Horizontal resolution | 300 dpi |
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File change date and time | 23:11, 8 November 2015 |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 17:47, 2 September 2011 |
Image compression mode | 4 |
APEX shutter speed | 7.965784 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
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Saturation | Normal |
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Subject distance range | Unknown |
Date metadata was last modified | 16:11, 8 November 2015 |
Unique ID of original document | AAFA23BF3D11D755BA852FF01A194718 |