Tag Archives: crater lakes

Overflowing crater lakes carved Mars canyons

Today, most of the water on Mars is locked away in frozen ice caps. But billions of years ago it flowed freely across the surface, forming rushing rivers that emptied into craters, forming lakes and seas. New research led by … Continue reading

Posted in Reports | Tagged , , | Comments Off

HiRISE: Three channels exiting a crater lake

This image shows a roundish crater with three channels breaching the rim and extending to the south. The crater has been filled by sediments and may have been an ancient lake. When the water began to overtop the crater rim, … Continue reading

Posted in Reports | Tagged , , , , , , , , | Comments Off

HiRISE: Crater tadpoles

This impact crater looks amusingly like a tadpole because of the valley that was carved by water that used to fill it. When the water level inside the crater increased, it breached the crater wall, flowed outward and formed a … Continue reading

Posted in Reports | Tagged , , , , , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , , , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , , , , , , | Comments Off