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Last updated on April 19, 2014 at 21:20 EDT
Landslide blocks channel
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Landslide blocks channel

August 18, 2005
This is a close-up of the image taken by Mars Express on 14 June 2004. Uzboi Vallis enters Crater Holden from the south-west. Two distinct phases of its development can be seen. In the first phase, a valley was formed up to 20 kilometres wide. Later, a smaller channel was cut into the valley floor. The end of the small channel has been blocked by a landslide from the crater rim.