Granicus Valles and Tinjar Valles
Science & Exploration

Granicus and Tinjar Valles

28/07/2006 1270 views 2 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 regions of Granicus Valles and Tinjar Valles, which may have been formed partly through the action of subsurface water, due to a process known as sapping.

Map showing Granicus Valles and Tinjar Valles in context
Map showing Granicus Valles and Tinjar Valles in context

The HRSC obtained these images during orbit 1383 at a ground resolution of approximately 23.7 metres per pixel. The images have been rotated 90 degrees counter-clockwise, so that North is to the left.

They show the regions of Granicus Valles and Tinjar Valles, lying at approximately 26.8° North and 135.7° East. The northwest-aligned Granicus Valles and Tinjar Valles are part of the Utopia-Planitia region, an area thought to be covered by a layer of lava that flowed from the northwest flanks of Elysium Mons into the Utopia-Planitia Basin.

Granicus Valles and Tinjar Valles, black and white (North to the left)
Granicus Valles and Tinjar Valles, black and white (North to the left)

Today, this once-smooth volcanic plain is incised by channels of variable size and appearance, including Granicus Valles (towards the West) and Tinjar Valles (towards the North).

Both channel systems evolve from a single main channel entering the image scene from southeast (upper right), exhibiting an approximate width of 3 km and extending 300 m below the surrounding terrain at maximum. The impressive sinuous lava channel emanates from the mouth of a radial, a circular drainage area, and runs to the Elysium rise trending into a graben, which is terrain dissected by tectonic deformation.

This narrow, straight, 4-km wide and 120-km long graben is interpreted as the source of both lava flows and debris flows that carved Granicus and Tinjar Valles. Similar Elysium flank grabens at higher elevations lack outflow channels. This elevation dependence leads scientists to suggest that subsurface water, released by volcanic activity, has later played a role in shaping the channels visible today.

The colour scene was derived from the three HRSC-colour channels and the nadir channel. The 3D anaglyph image was calculated from the nadir and one stereo channel. Image resolution has been decreased for use on the internet.

Granicus Valles and Tinjar Valles, 3D anaglyph
Granicus Valles and Tinjar Valles, 3D anaglyph

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

Related Links

Kasei Valles, 3D anaglyph showing Northern branch
Science & Exploration

3D anaglyph images - Kasei Valles

30/08/2006 971 views 3 likes
Open item
Granicus Valles and Tinjar Valles
Science & Exploration

Granicus and Tinjar Valles

28/07/2006 1270 views 2 likes
Open item
Chaotic terrain in Iani Chaos
Science & Exploration

Chaotic terrain in Iani Chaos

17/07/2006 2873 views 3 likes
Open item
Apollinaris Patera caldera in false colour
Science & Exploration

Ancient caldera in Apollinaris Patera

09/06/2006 1969 views 2 likes
Open item
Aram Chaos in false colour
Science & Exploration

Heavily eroded Aram Chaos

30/05/2006 2179 views 2 likes
Open item
Pavonis Mons
Science & Exploration

Lava tubes on Pavonis Mons

23/05/2006 5478 views 7 likes
Open item
Extensional tectonics in Tempe Terra
Science & Exploration

Extensional tectonics in Tempe Terra

08/05/2006 1215 views 1 likes
Open item
Nanedi Valles valley system on Mars
Science & Exploration

Nanedi Valles system on Mars

24/04/2006 3036 views 4 likes
Open item
Crater Galle, the 'happy face' on Mars
Science & Exploration

'Happy face' crater on Mars

10/04/2006 8128 views 13 likes
Open item
Libya Montes valley region on Mars
Science & Exploration

The Libya Montes valley on Mars

27/03/2006 2282 views 2 likes
Open item
Perspective view, looking north-west, from behind the 'hourglass' crater
Science & Exploration

'Hourglass'-shaped crater - new video and perspectives

17/03/2006 2241 views 3 likes
Open item
Perspective view of the eastern scarp of Olympus Mons, looking south-west
Science & Exploration

Eastern scarp of Olympus Mons

03/03/2006 4632 views 3 likes
Open item
Perspective view of the Ausonia Mensa massif
Science & Exploration

Ausonia Mensa remnant massif

24/02/2006 1575 views 0 likes
Open item
Perspective view of Phlegethon Catena
Science & Exploration

Pits and tectonic grabens in Phlegethon Catena

09/02/2006 2654 views 2 likes
Open item
The Claritas Fossae region of Mars
Science & Exploration

Claritas Fossae region of Mars

03/02/2006 597 views 0 likes
Open item
The High Resolution Stereo Camera (HRSC)
Science & Exploration

Behind the lens...

13/02/2004 2212 views 3 likes
Open item