Tag Archives: valley networks

Sedimentology and hydrology of Amazonian paleo-fluvio-lacustrine system in Moa Valles

Posted on March 31, 2016 by rburnham

Planetary Geomorphology Image of the Month, March 31, 2016: Francesco Salese (Università D’Annunzio, Italy). Mars, is one of the planetary bodies where water flowed and where it may transiently flow today under certain conditions. Many martian paleodrainage systems and well-preserved … Continue reading →

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HiRISE: Landforms in northern Terra Sirenum

Posted on October 20, 2015 by rburnham

Cartographer’s delight — landforms near a valley terminus in Northern Terra Sirenum. Beautiful Mars series.

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Explaining valley networks with climate models

Posted on October 14, 2015 by rburnham

The extensive valley networks on the surface of Mars were probably created by running water billions of years ago, but the source of that water is unknown. Now, a team of Penn State and NASA researchers is using climate models … Continue reading →

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Groundwater outflow in experiments and on Mars

Posted on September 3, 2015 by rburnham

Planetary Geomorphology Image of the Month, September 2, 2015: Wouter Marra (Universiteit Utrecht, Netherlands). There are many water-worn features on the planet Mars, which contribute to the reconstruction of former hydrological conditions. For example, dendritic valley networks show that there … Continue reading →

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Tallying up where the Martian carbon went

Posted on September 2, 2015 by rburnham

Scientists may be closer to solving the mystery of how Mars changed from a world with surface water billions of years ago to the arid Red Planet of today. A new analysis of the largest known deposit of carbonate minerals … Continue reading →

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HiRISE: Rocky deposit

Posted on May 5, 2014 by rburnham

Beautiful Mars series. Rocky deposit that appears to emanate from Warrego Valles channel. More Beautiful Mars images.

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HiRISE: Complex valley network near Idaeus Fossae

Posted on March 12, 2014 by rburnham

Many valleys occur all over Mars that reveal an extensive ancient history of liquid water erosion. While these valley systems are typically now covered with fine soils and sand dunes, the overall scale and shape of the valleys reveals much … Continue reading →

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‘Faint young Sun paradox’ a problem for Mars (and Earth, too)

Posted on April 3, 2013 by rburnham

Astronomers say that billions of years ago when the Sun was young, it shone with only 70 percent its current brightness, notes Robert Craddock (Smithsonian Institution). If that were true of today’s Sun,

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Cloudburst rains needed to make Mars valley networks

Posted on August 27, 2012 by rburnham

In many regions, Mars has branching networks of valleys and channels that were carved by flowing water. A great many previous studies have tried to date when they were active and for how long, while others have looked in detail … Continue reading →

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Valley networks were eroded quckly

Posted on November 22, 2011 by rburnham

Networks of valleys cross much of the ancient surface of Mars, and along with deltas and other features these all show that the environment once warm and wet enough to sustain liquid water at the surface. But when? And for … Continue reading →

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