Jump to content

File:Richat Structure ISS030-E-12516.jpg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (4,288 × 2,848 pixels, file size: 2.78 MB, MIME type: image/jpeg)

Summary

Description
English: The Richat Structure of Mauritania has captured the attention of astronauts for about as long as NASA has sent humans into orbit around Earth. This circular geologic feature is thought to be caused by an uplifted dome—geologists would classify it as a domed anticline—that has been eroded to expose the originally flat rock layers.

In this type of geologic structure, rocks exposed in the center of the “bullseye” are older than rocks forming the outer rings. This structure measures 45 kilometers (28 miles) across and is made up of igneous and sedimentary rocks. There are several faults visible (lower left) where strata that were once continuous have been shifted apart.

Most of Mauritania lies within the Sahara Desert, where dry climate conditions and periodic droughts create difficult living conditions. Approximately 3.7 million people live in Mauritania, though much of the population lives along its Atlantic coastline, about 500 kilometers (300 miles) from the Richat Structure.

Astronaut photograph ISS030-E-12516 was acquired on December 17, 2011, with a Nikon D2Xs digital camera using a 400 millimeter lens and is provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 30 crew. The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Andrea Meado, Jacobs Technology, JETS Contract at NASA-JSC.
Date Taken on 17 December 2011, 17:28:02
Source https://earthobservatory.nasa.gov/images/92071/richat-structure; see also https://eol.jsc.nasa.gov/SearchPhotos/photo.pl?mission=ISS030&roll=E&frame=12516
Author NASA
Geographic Area
InfoField
Mauritania
Features
InfoField
RICHAT STRUCTURE, SAHARA DESERT
Clouds Percentage
InfoField
10%
Look angle
InfoField
HO
Look direction
InfoField
NE
Sun Azimuth
InfoField
240°
Sun Elevatation
InfoField
14°
Altitude
InfoField
219 nautical miles (406 km)
Mission
InfoField
ISS030
Roll
InfoField
E
Frame
InfoField
12516
Camera
InfoField
Nikon D2Xs Electronic Still Camera
Focal length
InfoField
400 mm
Object location21° 06′ 00″ N, 11° 24′ 00″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS030-E-12516 and Alternate ID: ISS030E12516.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
Other languages:

Licensing

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
Warnings:

Captions

Richat Structure

Items portrayed in this file

depicts

0.002 second

400 millimetre

17 December 2011

219 nautical mile

image/jpeg

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current16:55, 25 February 2021Thumbnail for version as of 16:55, 25 February 20214,288 × 2,848 (2.78 MB)JstubyUploaded a work by NASA from NASA Earth Observatory, [https://earthobservatory.nasa.gov/images/92071/richat-structure Richat Structure] with UploadWizard

The following 3 pages use this file:

Global file usage

The following other wikis use this file:

Metadata