Tag Archives: wind erosion

HiRISE: Dunes in western Medusae Fossae

Dunes in western Medusae Fossae. These dark dunes in the western Medusae Fossae Formation provide some evidence of being derived locally, probably coming from the north and because of the wind. Beautiful Mars series.

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THEMIS: Wind, dust, and gravity in Medusae Fossae

THEMIS Image of the Day, April 10, 2018. This VIS image is located in Medusae Fossae. Along the cliffside several dark streaks are visible. It is thought that these streaks mark the location where downslope movement of material has removed … Continue reading

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THEMIS: Spiny ridges of Lycus Sulci

THEMIS Image of the Day, March 29, 2018. Lycus Sulci is a very complex region surrounding the northern and western flanks of Olympus Mons. This VIS image shows several features found in Lycus Sulci including tectonic derived ridges with dark … Continue reading

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HiRISE: Wrinkles in rock

The bedrock in this region of Arabia Terra has been worn away by the wind, revealing their internal structure and geologic history. The wavy lines are individual layers of sand and dust, originally laid down as the bedrock was forming. … Continue reading

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HiRISE: Fall in the Hellas Basin

Fall in the Hellas Basin. We took this image during the Martian fall in the Southern Hemisphere, in the giant impact crater known as Hellas Basin where small boulders cast long shadows. The long shadows emphasize small scale topographic features. … Continue reading

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THEMIS: Yardangs in Candor Chasma

THEMIS Image of the Day, January 12, 2018. This image shows part of eastern Candor Chasma. In the middle of the image is a set of linear ridges and valleys. These features are called yardangs and are created by uniform … Continue reading

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THEMIS: Mesa and dunes in Candor Chasma

THEMIS Image of the Day, January 9, 2018.  This image shows part of western Candor and the erosion of a large mesa. Layered materials are visible throughout the image. The dark material with the linear appearance in the middle of … Continue reading

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THEMIS: Chaotic deposits in Candor Chasma

THEMIS Image of the Day, January 8, 2018. Candor Chasma is one of the largest canyons that make up Valles Marineris. It is approximately 810 km long (503 miles) and has is divided into two regions – eastern and western … Continue reading

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Opportunity report, Sol 4925, by A.J.S. Rayl, The Planetary Society

December 1, 2017: Opportunity Returns Fundamental Finding in Perseverance, Cruises Through Winter Solstice: Opportunity continued the historic winter science campaign inside Perseverance Valley and delivered the goods that confirmed an important discovery in November, and then cruised through winter solstice, … Continue reading

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HiRISE: Yardangs – nature’s weathervanes

The prominent tear-shaped features in this image are erosional features called yardangs. Yardangs are composed of sand grains that have clumped together and have become more resistant to erosion than their surrounding materials. As the winds of Mars blow and … Continue reading

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