Echus Chasma is approximately 100 km long and 10 km wide, with valleys ranging in depth from around 1 km to 4 km. It is the source region of the Kasei Valles outflow channel, which extends northward from it. It is situated just west of Hebes Chasma, to which it does not connect.
- ESA (2008-07-14). Echus Chasma. Retrieved on 2008-07-15 from http://www.esa.int/esaSC/SEM4CATHKHF_index_0.html.
- Smith, Graham (2008-07-15). Incredible pictures of Mars - and they look surprisingly like some parts of Earth. Retrieved on 2008-07-15 from http://www.dailymail.co.uk/sciencetech/article-1035440/Incredible-pictures-Mars--look-surprisingly-like-parts-Earth.html.
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