Tag Archives: northern plains

HiRISE: Cratered cones on northern plains

Cratered cones on northern plains. The title alone sounds delicious. These cratered cones might be mud volcanoes, landforms created by the eruption of mud or slurries, water and gases. No lava involved. HiRISE Picture of the Day archive. [More at … Continue reading

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CRISM: Olivine and pyroxene in ejecta from northern plains crater

CRISM scene HRL00003BEE covers an area in close proximity to a crater in the northern plains of Mars. In this image, we see strong Fe-rich olivine (yellow) and high calcium pyroxene (HCP, blue) signatures in the ejecta near the crater … Continue reading

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THEMIS: Ice-rich mantling in Utopia crater

THEMIS Image of the Day, April 16, 2019. This false-color VIS image shows a crater located in Utopia Planitia. The crater’s interior shows ample evidence for an ice-rich mantling material that has slipped and slumped away from the crater’s upraised … Continue reading

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HiRISE: Frost-covered dunes

Frost-covered dunes. Sprinkled with hopes and dreams, no less. This is a relatively new monitoring site that seems to have heavy carbon-dioxide snowfall. HiRISE Picture of the Day archive [More at links]

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HiRISE: For your consideration

For your consideration. An alien landscape with dust devil streaks and craters slowing fading away into the mists of time. A twilight zone of geology, if you will. (Features like this are often called “thumbprint terrain”.) HiRISE Picture of the … Continue reading

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CRISM: Hydrated minerals of Cydonia Colles

In this scene we observe the knobs within the northern lowlands (Acidalia Planitia) that are Fe/Mg phyllosilicate-bearing (pink-blue) and small, patchy exposures of hydrated silica (green) surrounding the knobs. Previously, phyllosilicates have only been found within impact craters in the … Continue reading

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THEMIS: Subdued northern plains craters

THEMIS Image of the Day, October 10, 2018. This VIS image shows the margin and ejecta surrounding two craters located in the northern plains. The rim and ejecta are very subdued compared to craters elsewhere in the same region. The … Continue reading

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THEMIS: Blast zone at Lonar Crater

THEMIS Image of the Day, May 7, 2018. This VIS image shows the part of the crater rim and ejecta surrounding Lonar Crater in the northern plains of Vastitas Borealis. There is a fine scale, radial grooved outer layer of … Continue reading

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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

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HiRISE: Seasonal frost on crater slopes

Seasonal frost on crater slopes. Beautiful Mars series.

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