File:Ounianga Lakes from ISS.jpg

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English: Ounianga Sérir group. This astronaut photograph features one of the largest of a series of ten mostly fresh water lakes in the Ounianga Basin in the heart of the Sahara Desert of northeastern Chad. The lakes are remnants of a single large lake, probably tens of kilometers long, that once occupied this remote area approximately 14,800 to 5,500 years ago. As the climate dried out during the subsequent millennia, the lake shrank, and large, wind-driven sand dunes invaded the original depression, dividing it into several smaller basins.
The area shown in this image is approximately 11 by 9 kilometers. The lakes’ dark surfaces are almost completely segregated by linear, orange sand dunes that stream into the depression from the northeast. The almost-year-round northeast winds and cloudless skies make for very high evaporation rates; an evaporation rate of more than 6 meters per year has been measured in one of the nearby lakes. Despite this, only one of the ten lakes is saline.
Data Taken on 2009 m. lapkričio 14 d., 13:04 UTC
Šaltinis http://earthobservatory.nasa.gov/IOTD/view.php?id=41425 at the Wayback Machine
Autorius NASA
Fotografijos koordinatės18° 55′ 48,29″ N, 20° 52′ 15,35″ E  Heading=0° Kartographer map based on OpenStreetMap.Šis ir kiti paveikslėliai: OpenStreetMapinfo
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS021-E-26475.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
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This file is in the public domain in the United States because it was created by the Image Science & Analysis Laboratory, of the NASA Johnson Space Center. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA media use guidelines or Conditions of Use of Astronaut Photographs). Photo source: ISS021-E-26475.

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dabartinis12:33, 8 lapkričio 2020Versijos 12:33, 8 lapkričio 2020 miniatiūra4 288 × 2 848 (3,88 MiB)Ras67 (aptarimas | indėlis)new rendered in high quality and native resolution from NASA's raw image data
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20:08, 2 gruodžio 2009Versijos 20:08, 2 gruodžio 2009 miniatiūra1 440 × 960 (316 KiB)Monfornot (aptarimas | indėlis){{Information |Description={{en|1=This astronaut photograph features one of the largest of a series of ten mostly fresh water lakes in the Ounianga Basin in the heart of the Sahara Desert of northeastern Chad. The lakes are remnants of a single large lake

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