Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



Glacial, Volcanic And Fluvial Activity On Mars

This image of the Martian north polar ice cap shows layers of water ice and dust for the first time in perspective view. Here we see cliffs which are almost 2 kilometres high, and the dark material in the caldera-like structures and dune fields could be volcanic ash. Credits: ESA/DLR/FU Berlin (G. Neukum). 1024 desktop availiable.
Paris (ESA) Feb 28, 2005
These images, taken by the High Resolution Stereo Camera (HRSC) on board ESA's Mars Express spacecraft, were released at the First Mars Express Science Conference this week. They show the areas of focused research - water, ice, glaciers and volcanism.

These two images of the Martian north polar ice cap show layers of water ice and dust for the first time in perspective view. The close-up view (right) is the upper right section of the image above.

Here we see cliffs which are almost 2 kilometres high, and the dark material in the caldera-like structures and dune fields could be volcanic ash.

In the image above, also at the north pole, the Mars Express spacecraft saw fields of volcanic cones. Some are up to 600 metres high.

They appear to indicate very recent volcanic activity. The question remains, is it on-going activity?

The two smaller images are close-up top views of two cones: the left one is visible in the lighter top part of the main image, and the right one is just visible half way down the dark side of the slope.

This image is Kasei Valles, one of the largest outflow channels on Mars, and contains a lot of evidence for glacial and fluvial activity over much of the planet's history.

Kasei Valles has been imaged before by the HRSC during orbit 61 from an altitude of 272 kilometres. These images are located about 29 North and 300 East.

The scour marks in the valley, shown in the image on the left, are most likely due to glacial erosion than by water erosion. This is contrary to what was previously thought.

The glacier that caused this valley was fed by water from the Echus Chasma region, which was driven out from underneath the surface by volcanic activity. Water was released by heating from volcanic activity in the channel floor as relatively recently as 20 million years ago.

Echus Chasma is the source region of the Kasei Valles channel. This perspective image was taken by Mars Express during orbit 97. It shows that liquid water was present on the surface of Mars thousands of millions of years ago.

Gigantic waterfalls poured over the 4000-metre high cliffs, and fed a lake in the valley. Later, when the planet became cooler, the lakes froze and glaciers formed, carving the giant Kasei Valles.

These perspective views of the western side of the Olympus Mons caldera show evidence of ice/snow and water. The close-up image (right) shows detail in the left side of the scarp above.

On the eastern side of the giant volcano, lava produced between 200 million and 20 million years ago melted a snow and ice layer on the volcanic shield, with the result that liquid water was on the surface as recently as 20 million years ago.

On the western side, lava produced between 200 million and 2.5 million years ago mobilised underground water and formed glaciers as recently as four million years ago.

These findings were presented on 21 February at ESA's Mars Express Science Conference at ESTEC in Noordwijk, the Netherlands, where about 250 scientists from all over the world are discussing the first year of scientific results from Mars Express.

The colour images were processed using the HRSC nadir (vertical view) and three colour channels. The perspective views were calculated from the digital terrain model derived from the stereo channels.

Related Links
SpaceDaily
Search SpaceDaily
Subscribe To SpaceDaily Express

Melas, Candor And Ophir Chasmas: Centre Of Valles Marineris
Paris (ESA) Feb 16, 2005
These images, taken by the High Resolution Stereo Camera (HRSC) on board ESA's Mars Express spacecraft, show the central part of the 4000-kilometre long Valles Marineris canyon on Mars.



Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only






Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News








The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.