Alluvial fan, Taklimakan desert
Alluvial fan, Taklimakan desert
Alluvial fan, Taklimakan desert
Taken by the EarthKAM mission on the International Space Station, this photograph shows numerous radial river channels in a large alluvial fan in the Desert of Taklimakan. This is the active part of the fan, with several channels of clear tones that carry water. Water flows in the desert from the Kunlun mountains covered with snow to the south. The modern fan is 65 kilometers (40 miles) long, and its channels end in dune fields.
The population density is very low in this remote dry region of western China. The only signs of people are two straight roads and a small reservoir, which supplies water to a small area of crops just outside the top of the image. (For the scale, the reservoir is approximately 2 kilometers long). In contrast, similar alluvial fanatics in the west harbor major population centers and are covered in dense green fields. as seen from space.
The smooth surface of the fan is interrupted by elongated hills. These are older, lithified sediment deposits of the fan that have been pushed from the subsoil along geological faults. The vertical movements of rock along the faults are the result of the tectonic forces that are currently building the Kunlun Mountains.
Photograph of EarthKAM (Knowledge of the Earth acquired by high school students) CCFID_155475_2017306054734 it was acquired on November 2, 2017, with a Nikon D2Xs digital camera with a 180 mm lens, and is provided by Sally Ride EarthKAM @ Space Camp on the International Space Station. The title is provided by the Earth Science and Remote Sensing Unit, NASA's Johnson Space Center. EarthKAM is an educational outreach program from NASA that allows students, teachers and the public to learn about Earth from the unique perspective of space. During the Sally Ride EarthKAM missions, high school students around the world request images of specific locations on Earth. The image in this article has been improved to improve the contrast. Legend by M. Justin Wilkinson, Texas State University, Jacobs contract at NASA-JSC.
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