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Ma'adim Vallis

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Title: Ma'adim Vallis  
Author: World Heritage Encyclopedia
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Subject: Aeolis quadrangle, Eridania Lake, Phaethontis quadrangle, Enipeus Vallis, Outflow channels
Collection: Valleys and Canyons on Mars
Publisher: World Heritage Encyclopedia

Ma'adim Vallis

Ma'adim Vallis
Viking orbiter view of Ma'adim Vallis, with Gusev Crater outlet at top
Length 825.0 km
Naming Word for "Mars" in Hebrew

Ma'adim Vallis is one of the largest outflow channels on Mars, about 700 km long and significantly larger than Earth's Grand Canyon. It is over 20 km wide and 2 km deep in some places. It runs from a region of southern lowlands thought to have once contained a large group of lakes (see Eridania Lake) north to Gusev crater near the equator. It looks as if water may have collected in Gusev crater, forming a giant lake; the Spirit Rover was sent there to investigate that possibility, but found only volcanic rocks on the floor of Gusev. Any lake deposits were probably covered over by a later deposit of volcanic materials from Apollinaris Mons, a nearby volcano.

Ma'adim Vallis is thought to have been carved by flowing water early in Mars' history. Some of the short narrow channels along the walls of Ma'adim are probably sapping channels. Sapping occurs when groundwater partially dissolves and undermines the rock, which collapses into debris deposits and is carried away by other erosion processes.

Ma'adim (מאדים) is the Hebrew name of the Planet Mars.

See also

External links

  • Google Mars zoomable map centered on Ma'adim Vallis
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