Tag Archives: High Resolution Imaging Science Experiment

HiRISE: Layered mantling deposits in the northern mid-latitudes

Ice-rich mantling deposits accumulate from the atmosphere in the Martian mid-latitudes in cycles during periods of high obliquity (axial tilt), as recently as several million years ago. These deposits accumulate over cycles in layers, and here in the southern mid-latitudes, … Continue reading

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HiRISE: Obstacles and wakes in lava

Amazonis Planitia is a broad plain on Mars, covered with ancient lava. This image shows an interesting feature of an old lava flow. When it was mostly liquid, the lava had a crust of cooled debris floating on the surface. … Continue reading

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HiRISE: Terminal lobes of a large debris flow in Melas Chasma

Terminal lobes of a large debris flow in Melas Chasma. Beautiful Mars series.

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HiRISE: New crater on a dusty slope

This image shows a new impact site originally detected by the Context Camera onboard MRO. The crater is on a dusty slope, which also has several dark slope streaks due to dust avalanches. A previous impact at another place on … Continue reading

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HiRISE: Bedrock in Antoniadi Crater

Bedrock in Antoniadi Crater. Beautiful Mars series.

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HiRISE: Scars of erosion

This large crescent dune in Kaiser Crater shows the scars of many types of seasonal erosional activities. Along its downwind slope are large gullies which are active during winter, when frost drives dune material downslope, carving out channels and creating … Continue reading

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HiRISE: A dust devil on hilly terrain

There are many dust devils on Mars — little twisters that raise dust from the surface. They have also cleaned dust off of the solar panels of the rovers Opportunity and Spirit, improving the solar power production. (Spirit became stuck … Continue reading

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HiRISE: Old features and new

This image covers a portion of a typical impact crater in Terra Sirenum at about 40 degrees south latitude on Mars. At the top of the image, outside the crater rim, there is a mid-latitude mantle, rough in places where … Continue reading

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HiRISE: Craters on a crater’s floor

Craters on a crater’s floor. Beautiful Mars series.

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HiRISE: Better preserved on Mars than on Earth

In many ways, Mars bears remarkable similarities to Earth, but in some ways it is drastically different. Scientists often use Earth as an example, or analog, to help us to understand the geologic history of the Red Planet. As we … Continue reading

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