Tag Archives: crustal dichotomy

HiRISE: Inverted channels

Inverted channels at the boundary of highlands and intercrater plains. This image targets inverted channels located at the boundary between Noachian highlands and Noachian intercrater plains bedrock. These channels are 200 to 500 meters wide, implying substantial fluvial activity. High-resolution … Continue reading

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

Crustal dichotomy: First a giant impact, then a superplume at the antipode

The result of collaboration between researchers at UC Berkeley, USA and the Institute of Earth Sciences, Taiwan, suggests a two-stage process to explain the martian crustal dichotomy. The dichotomy is a 5-km elevation difference between the northern and southern hemispheres … Continue reading

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

HRSC: Mars impact crater or supervolcano?

These images from [the High Resolution Stereo Camera on] ESA’s Mars Express show a crater named Ismenia Patera on the Red Planet. Its origin remains uncertain: did a meteorite smash into the surface or could it be the remnants of … Continue reading

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

Mars’ oceans formed early, with a possible assist from volcanism

A new scenario seeking to explain how Mars’ putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million years earlier and were not as deep as once thought. The proposal [published … Continue reading

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

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

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

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

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

HiRISE: Highlands to lowlands in far-west Arabia

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

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

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.

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

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

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

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

Posted in Reports | Tagged , , , | Comments Off