File:Southern San Rafael Fremont Indian petroglyphs (~400 to ~1350 A.D.) (Capitol Reef National Park, southern Utah, USA) 2 (22899336311).jpg

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Summary

Anthropomorphs & animals - 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 - <a rel="nofollow" class="external text" href="http://www.mindat.org/min-680.html">www.mindat.org/min-680.html</a>). Scraping or hammering away at the desert varnish exposes the light-colored sandstone.

The anthropomorphs seen here are classic examples of Fremont Indian rock art - note the subtriangular-shaped bodies and the lollipop-like structures ("hair bobs") at the sides of the heads.

Locality: cliff face ~0.4 kilometers northeast of the Sulphur Creek-Fremont River confluence, Capitol Reef National Park, southern Utah, USA

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File history

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Date/TimeThumbnailDimensionsUserComment
current10:30, 5 January 2017Thumbnail for version as of 10:30, 5 January 20173,001 × 1,925 (4.84 MB)127.0.0.1 (talk)<p>Anthropomorphs & animals - Southern San Rafael Fremont Indian petroglyphs (~400 to ~1350 A.D.) on desert varnish-covered quartzose sandstone (Wingate Sandstone, Lower Jurassic) in Utah. </p> <p>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 - <a rel="nofollow" class="external text" href="http://www.mindat.org/min-680.html">www.mindat.org/min-680.html</a>). Scraping or hammering away at the desert varnish exposes the light-colored sandstone. </p> <p>The anthropomorphs seen here are classic examples of Fremont Indian rock art - note the subtriangular-shaped bodies and the lollipop-like structures ("hair bobs") at the sides of the heads. </p> <p>Locality: cliff face ~0.4 kilometers northeast of the Sulphur Creek-Fremont River confluence, Capitol Reef National Park, southern Utah, USA </p>
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