Tag Archives: HiRISE

HiRISE: Transition

Posted on July 1, 2019 by rburnham

Transition. This image shows where a fluvial channel changes from a depression to an inverted high standing channel in Terra Sirenum. That change likely marks the spot where the material was possibly elevated and more resistant to erosion. HiRISE Picture … Continue reading →

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HiRISE: Troughs and ridges

Posted on June 28, 2019 by rburnham

Troughs and ridges. These wide troughs in Chryse Planitia have a narrow ridge running down the middle. How did these form? (North is to the right.) HiRISE Picture of the Day archive. [More at links]

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HiRISE: When lava moved

Posted on June 27, 2019 by rburnham

When lava moved. The objective of this observation is to examine the remains of an ancient lava flow moving in a trough in the Claritas Fossae region. Pictures like this may tell us more about how lava flowed on Mars. … Continue reading →

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HiRISE: Along a scarp

Posted on June 21, 2019 by rburnham

Along a scarp. All along this section of scarp of a canyon in Kasei Valles, there appears to be a lobe-shaped margin of something (lava? mud? flood sediments?) that flowed into this trough, coated the floor and subsequently drained. What’s … Continue reading →

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HiRISE: Volcanic field on floor of Coprates Chasma

Posted on June 19, 2019 by rburnham

A volcanic field on the floor of Coprates Chasma. In this image, there are some nice cones with summit craters surrounded by a flow field. They look young, but they could have been buried and re-exhumed based on nearby pedestal … Continue reading →

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HiRISE: Uncommon

Posted on June 18, 2019 by rburnham

Uncommon. Craters are, of course, common on Mars, but what is interesting about this one is that the impact excavated some uncommon hydrous minerals. Also, the image suggester’s name is John Carter. Make of that what you will. HiRISE Picture … Continue reading →

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HiRISE: Cratered cones on northern plains

Posted on June 17, 2019 by rburnham

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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HiRISE: A channel in the southern mid-latitudes

Posted on June 14, 2019 by rburnham

A channel in the southern mid-latitudes. The objective of this observation is to examine a channel on the eastern side of an eroded crater wall. This scene was also imaged by the Context Camera onboard MRO. HiRISE Picture of the … Continue reading →

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HiRISE: Landing in Oxia Palus

Posted on June 13, 2019 by rburnham

This image shows a cratered area to the southeast of the ExoMars 2020 Rosalind Franklin rover landing site at Oxia Palus. Selecting and characterizing landing sites is a balance between having science targets and avoiding potential obstacles, and HiRISE is … Continue reading →

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HiRISE: Dune footprints in Hellas Planitia

Posted on June 12, 2019 by rburnham

These curious chevron shapes in southeast Hellas Planitia are the result of a complex story of dunes, lava, and wind. Long ago, there were large crescent-shaped (barchan) dunes that moved across this area, and at some point, there was an … Continue reading →

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