English: This astronaut photograph highlights two river deltas formed along Lake Ayakum's south-western shoreline. Gray to tan surfaces indicate prior positions of the river channels; the uniform coloration and smooth texture suggest that they are relatively old and now inactive. By contrast, the younger and currently active delta surfaces have reddish-brown sediment and visible river channels.
Lateral channel migration is particularly evident in the approximately 8-kilometer wide active delta at image upper left. The reddish color of the fresh sediment may indicate a change from the sources that formed the older parts of the deltas. It might indicate weathering and soil formation on the older deposits. It could even be a sign of episodic inputs of dust or other material to the river catchments.
Image acquired with a Nikon D2Xs digital camera using a 400 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center.
Material del Telescopio espacial Hubble puede tener copyright si no proviene explícitamente del Space Telescope Science Institute. [1]
Todo el material creado por la sonda espacial SOHO está protegido por copyright y requiere permiso para ser utilizado con fines comerciales o no educativos. [2]
{{Information |Description ={{en|1=This astronaut photograph highlights two river deltas formed along Lake Ayakum's south-western shoreline. Gray to tan surfaces indicate prior positions of the river channels; the uniform coloration and smooth