Tag Archives: crustal dichotomy

New gravity map suggests Mars crust is porous

NASA scientists have found evidence that Mars’ crust is not as dense as previously thought, a clue that could help researchers better understand the Red Planet’s interior structure and evolution. A lower density likely means that at least part of … Continue reading

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Did a giant impact create the northern lowlands, both moons, and enrich the mantle?

The origin and nature of Mars are mysterious. The planet has geologically distinct hemispheres with smooth lowlands in the north and cratered, high-elevation terrain in the south. The red planet also has two small oddly-shaped oblong moons and a composition that sets … Continue reading

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HiRISE: Highlands to lowlands in far-west Arabia

From the highlands to the lowlands in the far western Arabia region. Beautiful Mars series.

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THEMIS: Nepenthes Mensae

THEMIS Image of the Day, April 13, 2016. The hills in this VIS image are part of Nepenthes Mensae, which is located along the margin of Terra Cimmeria. More THEMIS Images of the Day by geological topic.

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THEMIS: Crater in Terra Sabaea

THEMIS Image of the Day, April 7, 2016. This VIS image shows part of the floor of an unnamed crater on the northern edge of Terra Sabaea. Many processes have been at work to modify the initial floor to create … Continue reading

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Great tilt gave Mars a new face

The surface of the planet Mars tilted by 20 to 25 degrees 3 to 3.5 billion years ago. This was caused by a massive volcanic structure, the Tharsis volcanic dome, which is the largest in the Solar System. Because of … Continue reading

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THEMIS: Ridges

THEMIS Image of the Day, February 9, 2016. This VIS image shows a small portion of the boundary region between Terra Sabaea and Utopia Planitia. The ridges and valleys in this image were likely created by tectonic faulting. There is … Continue reading

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HRSC: Crossing the high/low boundary on Mars

On the boundary between the heavily cratered southern highlands and the smooth northern lowlands of Mars is an area rich in features sculpted by water and ice. Cydonia Mensae is a region of mesa-like structures, craters and otherwise smooth terrain. … Continue reading

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Two-faced Mars: Moon-size object hit south pole

The two hemispheres of Mars are more different from any other planet in our solar system. Non-volcanic, flat lowlands characterise the northern hemisphere, while highlands punctuated by countless volcanoes extend across the southern hemisphere. Although theories and assumptions about the … Continue reading

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Debris aprons and valley fill hold ancient ice several hundred million years old

Along the edge of the crustal dichotomy, where the southern highlands step down onto the northern plains, lies a landscape of mesas, buttes, and valleys. Valleys appear choked with linear streams of debris, and on the flanks of many mesas … Continue reading

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