Monthly Archives: August 2011

Down in the deltas

Although NASA passed over Eberswalde Crater to choose Gale Crater as the landing site for the Mars Science Laboratory (MSL), Eberswalde offers the best known example on Mars of a river delta built from sediment washed into a crater lake. … Continue reading

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A polar ocean leaves few clay deposits

The northern lowlands of Mars have long invited the notion that in ancient times they once contained a now-vanished polar ocean. Yet a longstanding argument against such was the lack of widespread clay minerals that would naturally occur with such … Continue reading

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Hadriaca Patera’s heavy footprint

On the northeast edge of the giant Hellas impact basin, the thick stack of lava in the volcano Hadriaca Patera weighed so much it depressed the Martian surface immediately around it. This bent and cracked the crust on the volcano’s … Continue reading

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About that mound in Gale Crater…

Next August, if plans go right, the Mars Science Laboratory rover, named Curiosity, will come sailing out of the Martian sky and power in for a soft landing on the floor of Gale Crater. Launched to look for geologic evidence … Continue reading

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Cracks in the basement

When geological forces open a crack in bedrock, molten magma can squeeze in and widen it, after which the magma cools and hardens in place. The result is a dike, and such features let geologists delve into an outcrop’s history … Continue reading

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Seasonal flows of water on Mars

Finding water on Mars is nothing new. Scientists have known for years that water (as ice) lies in the polar caps and underground in high latitudes. However images from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars … Continue reading

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