Tag Archives: crater lakes

Curiosity peels back layers on ancient martian lake

A long-lasting lake on ancient Mars provided stable environmental conditions that differed significantly from one part of the lake to another, according to a comprehensive look at findings from the first three-and-a-half years of NASA’s Curiosity rover mission. Different conditions … Continue reading

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High-silica rock ‘halos’ widen timeframe for possible Mars life

Lighter-toned bedrock that surrounds fractures and comprises high concentrations of silica — called “halos”— has been found in Gale crater on Mars, indicating that the planet had liquid water much longer than previously believed. The new finding is reported in … Continue reading

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HiRISE: Lakebeds in Holden Crater

Holden Crater was once filled by at least two different lakes. The sediments deposited in those lakes are relatively light-toned where exposed, as we see in this observation. Each layer represents a different point in time and perhaps a changing … Continue reading

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Curiosity: Water-altered (& faulted?) layers

Sol 1314, April 17, 2016. The Remote Micro-Imager (RMI) made this five-frame composite of layers in Mt. Sharp. The lower layers appear darker in color than the layers above, perhaps due to alteration by water during one or more of … Continue reading

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

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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THEMIS: Terra Sirenum – false color

THEMIS Image of the Day, March 15, 2016. Today’s false color image shows part of the plains of Terra Sirenum. The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a … Continue reading

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Curiosity: Clues how water shaped Mars landscape

Observations by NASA’s Curiosity Rover indicate Mars’ Mount Sharp was built by sediments deposited in a large lake bed over tens of millions of years. This interpretation of Curiosity’s finds in Gale Crater suggests ancient Mars maintained a climate that … Continue reading

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HiRISE: Ancient lake sediments

This image shows some interesting fractured materials on the floor of an impact crater in Arabia Terra. There is a channel entering the crater and exiting it (see CTX image). This channel, along with an unusual deposit on the lowest … Continue reading

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Most deltas on Mars created by short, catastrophic floods

Rivers that run into lakes and other standing bodies of water drop sediment where the flow slackens as it enters the body of water. Over time, the accumulating material builds a delta — a wedge of sediment whose form can … Continue reading

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