File:Indian petroglyphs (~100 B.C. to ~1540 A.D.) (Newspaper Rock, southeastern Utah, USA) 10 (22258929814).jpg
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Summary
[edit]DescriptionIndian petroglyphs (~100 B.C. to ~1540 A.D.) (Newspaper Rock, southeastern Utah, USA) 10 (22258929814).jpg |
Anthropomorph & deer - Indian petroglyphs (~100 B.C. to ~1540 A.D.) on desert varnish-covered quartzose sandstone (Wingate Sandstone, Lower Jurassic) in Utah. This is part of a fantastic panel of prehistoric and historic petroglyphs that was carved by several groups - Archaic Indians, the Anasazi, Fremont, Navajo, Pueblo, and Ute. The dark coloration of the rock is desert varnish - a mineral-encrusted rock surface that is common in many desert settings. Desert varnish is composed of clay minerals, brick red-colored hematite, and/or black-colored 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. The oldest petroglyphs are identified by the partial development of another layer of desert varnish - they are dark-colored than younger petroglyphs. Locality: Newspaper Rock, Newspaper Rock State Historic Monument, southeastern Utah, USA |
Date | |
Source | Indian petroglyphs (~100 B.C. to ~1540 A.D.) (Newspaper Rock, southeastern Utah, USA) 10 |
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@N05/22258929814. 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 | 21:34, 3 December 2015 | 3,008 × 2,000 (3.71 MB) | Basilicofresco (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
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File change date and time | 16:47, 8 November 2015 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 11:58, 4 September 2011 |
Meaning of each component |
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File source | Digital still camera |
Scene type | A directly photographed image |
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Digital zoom ratio | 1 |
Focal length in 35 mm film | 225 mm |
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Serial number of camera | 200638ad |
Lens used | 18.0-200.0 mm f/3.5-5.6 |
Date metadata was last modified | 09:47, 8 November 2015 |
Unique ID of original document | 183BAFE1C9AF71542195FBE105DBD0D5 |