Kasei Valles, perspective view of Northern branch, looking West
Science & Exploration

Kasei Valles outflow channel system

30/08/2006 6257 views 8 likes
ESA / Science & Exploration / Space Science / Mars Express

These images, taken by the High Resolution Stereo Camera (HRSC) on board ESA's Mars Express spacecraft, show the region of Kasei Valles, one of the biggest outflow channel systems on Mars. Kasei is the Japanese word for the planet Mars.

Kasei Valles, context map
Kasei Valles, context map

The HRSC obtained these images during orbit 1429 at a ground resolution of approximately 29 metres per pixel.

The Kasei Valles region lies approximately between 21° and 28° North at 292.5° East.

Connecting the southern Echus Chasma and the plain Chryse Planitia in the East, Kasei Valles has a width of roughly 500 kilometres and, if Echus Chasma is included, extends for approximately 2500 kilometres.

Kasei Valles, colour view of Northern branch
Kasei Valles, colour view of Northern branch

There are two sets of images in this release, one showing the North branch, one showing the South branch. Both branches extend approximately South-West to North-East, and the images have been rotated one-quarter clockwise so that North is to the right.

Both valley branches exhibit a depth of 2900 metres.

Kasei Valles, black and white view of Northern branch
Kasei Valles, black and white view of Northern branch

As one of the biggest outflow channel systems on Mars, Kasei Valles was probably formed by gigantic flood events and later additionally shaped by glacial activity.

Kasei Valles, perspective view of Northern branch, looking East
Kasei Valles, perspective view of Northern branch, looking East

In the first set of images, the Northern branch of Kasei Valles and the plain Sacra Mensa can be seen. An oval structure at the western edge of the scene is interpreted to be a crater caused by an oblique meteorite impact.

Kasei Valles, perspective view of Southern branch, looking East
Kasei Valles, perspective view of Southern branch, looking East

The Southern branch of Kasei Valles and Sacra Mensa, with its 1- to 2-kilometre-deep graben system, Sacra Fossae, is shown in the second set of images. The terraces are up to 30 kilometres wide, located at the base of the walls on both sides of the valley branch.

Kasei Valles, perspective view of Southern branch, looking South-West
Kasei Valles, perspective view of Southern branch, looking South-West

The colour scene was derived from three HRSC-colour channels. The perspective views have been calculated from the digital terrain model derived from the stereo channels. The 3D anaglyph images were derived from the stereo and nadir channels. Image resolution has been decreased for use on the internet.

(See note after last image below for more details.)

Kasei Valles, colour view of Southern branch
Kasei Valles, colour view of Southern branch
Kasei Valles, black and white view of Southern branch
Kasei Valles, black and white view of Southern branch

Note:

This image release includes two 3D anaglyph images. Use links at right to access these separately.

For more information on Mars Express HRSC images, please read our updated FAQ (frequently asked questions).

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