Colour plan view of Os­uga Valles

Colour plan view of Osuga Valles
Colour plan view of Os­uga Valles
Credit: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO

Colour plan view of Osuga Valles

View of the cen­tral part of Os­uga Valles on Mars. The val­ley is rel­a­tive­ly short at 164 kilo­me­tres long, but its width (up to 20 kilo­me­tres) and depth (up to 900 me­tres) sug­gest that mas­sive, catas­troph­ic floods have oc­curred here. The strong­ly ero­sive force of the wa­ter flow­ing through has left be­hind typ­i­cal land­scape fea­tures: teardrop-shaped is­lands that the flood­wa­ters streamed around, flow pat­terns on the val­ley floor in the form of rilles, and ter­races along the val­ley walls and stream­lined is­lands. The rilles on the val­ley floor give an in­di­ca­tion of the high flow rate of the wa­ter; stream­lines en­cir­cle the is­lands, prov­ing that the wa­ter flowed to­wards the north­east (low­er right). El­e­va­tion dif­fer­ences in the val­ley floor and in­ter­sect­ing/over­lap­ping val­leys in­di­cate that a num­ber of sep­a­rate flood­ing events took place. The High Res­o­lu­tion Stereo Cam­era (HRSC) ac­quired this im­age on 7 De­cem­ber 2013, dur­ing Mars Ex­press or­bit 12,624. The res­o­lu­tion is about 17 me­tres per pix­el. Copy­right note: As a joint un­der­tak­ing by DLR, ESA and FU Berlin, the Mars Ex­press HRSC im­ages are pub­lished un­der a Cre­ative Com­mons li­cence since De­cem­ber 2014: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO. This li­cence will al­so ap­ply to all HRSC im­ages re­leased to date.

View of the central part of Osuga Valles on Mars. The valley is relatively short at 164 kilometres long, but its width (up to 20 kilometres) and depth (up to 900 metres) suggest that massive, catastrophic floods have occurred here. The strongly erosive force of the water flowing through has left behind typical landscape features: teardrop-shaped islands that the floodwaters streamed around, flow patterns on the valley floor in the form of rilles, and terraces along the valley walls and streamlined islands. The rilles on the valley floor give an indication of the high flow rate of the water; streamlines encircle the islands, proving that the water flowed towards the northeast (lower right). Elevation differences in the valley floor and intersecting/overlapping valleys indicate that a number of separate flooding events took place. The High Resolution Stereo Camera (HRSC) acquired this image on 7 December 2013, during Mars Express orbit 12,624. The resolution is about 17 metres per pixel. Copyright note: As a joint undertaking by DLR, ESA and FU Berlin, the Mars Express HRSC images are published under a Creative Commons licence since December 2014: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO. This licence will also apply to all HRSC images released to date.

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