File:Eye of the Sahara.jpg
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English: Eye of the Sahara — Near the western edge of the Sahara Desert in Mauritania is a feature that resembles a large eye when viewed from space. The Eye of the Sahara, also known as the Richat Structure or Guelb er Richat, is a symmetrical dome of eroded sedimentary and volcanic rock. The outermost rings measure approximately 40 km (25 miles) across. Persistent northeasterly winds keep much of the dome free from sand, exposing the various layers of rock. The circular feature was initially interpreted to be an asteroid impact structure, but most scientists have now concluded that it was caused by geologic uplift.
This Landsat mosaic of four different scenes shows the geologic feature in false color. By blending visible and infrared wavelengths (bands), scientists can enhance the visibility of the various rock layers in contrast to the surrounding sand (yellow to white). The Eye of the Sahara is featured along with many other selected images in the USGS Earth as Art series: on.doi.gov/EROSGallery. Landsat is co-managed by USGS and NASA. |
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| Source | https://www.flickr.com/photos/27784370@N05/21020817912/ |
| Author | U.S. Geological Survey |
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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This image was originally posted to Flickr by U.S. Geological Survey at https://flickr.com/photos/27784370@N05/21020817912. It was reviewed on 19 January 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 06:10, 19 January 2022 | | 5,288 × 3,000 (2.2 MB) | Ooligan (talk | contribs) | Uploaded a work by U.S. Geological Survey from https://www.flickr.com/photos/27784370@N05/21020817912/ with UploadWizard |
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