Tag Archives: glaciers

HiRISE: Surface patterns of glacier-like landforms

The rotational axis of Mars is currently tilted by about 25 degrees, very similar to that of the Earth (at 23.4 degrees). However, while Earth’s axial tilt (also known as “obliquity”) tends to change very slightly over time (almost 3 … Continue reading

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THEMIS: Ice-choked Mamers Valles

THEMIS Image of the Day, August 23, 2016. This VIS image shows a small portion of Mamers Valles. Mamers Valles is a complex channel system that drained the highlands of Arabia Terra into the lowlands of Acidalia Planitia. More THEMIS … Continue reading

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HiRISE: Glorious glacier

This image has low-sun lighting that accentuates the many transverse ridges on this slope, extending from Euripus Mons (mountains). These flow-like structures were previously called “lobate debris aprons,” but the Shallow Radar (SHARAD) instrument on MRO has shown that they … Continue reading

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THEMIS: Ice-choked channels at highlands’ edge

THEMIS Image of the Day, July 14, 2016. This VIS image is located on the eastern margin of Terra Sabaea. The boundary region between the highlands of Terra Sabaea and the lower elevations of Utopia Planitia is a complex of … Continue reading

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Debris-covered glaciers on Earth and Mars

Planetary Geomorphology Image of the Month, June 30, 2016: David P. Mayer (University of Chicago).  Debris-covered glaciers are glaciers whose ablation zones are at least partially covered by supraglacial debris. On Earth, debris-covered glaciers are found in all major mountain … Continue reading

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THEMIS: Mamers Valles

THEMIS Image of the Day, June 3, 2016. This VIS image shows a small portion of Mamers Valles. Mamers Valles is a large complex set of channels in northern Arabia Terra that flow into Acidalia Planitia. More THEMIS Images of … Continue reading

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THEMIS: Arabia Terra channel

THEMIS Image of the Day, May 20, 2016. This VIS image shows a portion of an unnamed channel located on the northern margin of Arabia Terra. Numerous channels are found in this region, draining from the higher elevations of Arabia … Continue reading

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HiRISE: Possible crevassed glacier-like forms

Possible crevassed glacier-like forms. Beautiful Mars series.

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Mineral clues to subglacial volcanos in Sisyphi Montes

Volcanoes erupted beneath an ice sheet on Mars billions of years ago, far from any ice sheet on the Red Planet today, new evidence from NASA’s Mars Reconnaissance Orbiter suggests. The research about these volcanoes helps show there was extensive … Continue reading

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HiRISE: Periglacial swirls on a valley floor

Wondrously, wickedly wavy. Beautiful Mars series.

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